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View Full Version : Zlob.DNSchanger keeps detecting everytime i run Spybot



sribashyam
2008-11-11, 12:38
Hello !!

Most of the times i get redirected to some random websites (like click.smartbizsearch.com, results.yahoo.com, etc..) when i click on the search results in google & yahoo. It's too frequent in Yahoo! results.

I tried running Spybot it detects something called Zlob.DNS Changer and i removed it, but then it keeps coming back everytime i run Spybot scanner.

Please help!! I am pasting the recent HJT Log. I've been with this problem for a very long time. Your help will be appreciated.

Thanks in advance,
Sribashyam...

--------------------------------------------

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 4:03:30 PM, on 11/11/2008
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)
Boot mode: Normal

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\csrss.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\services.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Common Files\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
c:\program files\mcafee.com\agent\mcdetect.exe
c:\PROGRA~1\mcafee.com\vso\mcshield.exe
c:\PROGRA~1\mcafee.com\agent\mctskshd.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\wdfmgr.exe
C:\WINDOWS\system32\svchost.exe
c:\PROGRA~1\mcafee.com\vso\OasClnt.exe
C:\PROGRA~1\mcafee.com\vso\mcvsshld.exe
c:\program files\mcafee.com\agent\mcagent.exe
c:\progra~1\mcafee.com\vso\mcvsescn.exe
C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
C:\Program Files\HPQ\Quick Launch Buttons\EabServr.exe
C:\Program Files\Java\j2re1.4.2_05\bin\jusched.exe
C:\WINDOWS\System32\alg.exe
C:\WINDOWS\system32\hkcmd.exe
C:\WINDOWS\SOUNDMAN.EXE
C:\Program Files\ZyXEL\ADSL USB Modem\CnxDslTb.exe
C:\Program Files\iTunes\iTunesHelper.exe
C:\Program Files\PC Connectivity Solution\ServiceLayer.exe
C:\Program Files\iPod\bin\iPodService.exe
C:\WINDOWS\system32\wuauclt.exe
C:\Program Files\Internet Explorer\IEXPLORE.EXE
C:\Program Files\PC Connectivity Solution\Transports\NclUSBSrv.exe
C:\Program Files\PC Connectivity Solution\Transports\NclRSSrv.exe
C:\Program Files\PC Connectivity Solution\Transports\NclMSBTSrv.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\WINDOWS\system32\msiexec.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe
C:\WINDOWS\system32\wbem\wmiprvse.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.yahoo.com/
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} -

C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
O3 - Toolbar: McAfee VirusScan - {BA52B914-B692-46c4-B683-905236F6F655} - c:\progra~1

\mcafee.com\vso\mcvsshl.dll
O4 - HKLM\..\Run: [SynTPLpr] C:\Program Files\Synaptics\SynTP\SynTPLpr.exe
O4 - HKLM\..\Run: [SynTPEnh] C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [eabconfg.cpl] C:\Program Files\HPQ\Quick Launch Buttons\EabServr.exe

/Start
O4 - HKLM\..\Run: [UpdateManager] "C:\Program Files\Common Files\Sonic\Update

Manager\sgtray.exe" /r
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Program Files\Java\j2re1.4.2_05\bin\jusched.exe
O4 - HKLM\..\Run: [IgfxTray] C:\WINDOWS\system32\igfxtray.exe
O4 - HKLM\..\Run: [HotKeysCmds] C:\WINDOWS\system32\hkcmd.exe
O4 - HKLM\..\Run: [SoundMan] SOUNDMAN.EXE
O4 - HKLM\..\Run: [VSOCheckTask] "C:\PROGRA~1\McAfee.com\VSO\mcmnhdlr.exe" /checktask
O4 - HKLM\..\Run: [VirusScan Online] C:\Program Files\McAfee.com\VSO\mcvsshld.exe
O4 - HKLM\..\Run: [OASClnt] C:\Program Files\McAfee.com\VSO\oasclnt.exe
O4 - HKLM\..\Run: [MCAgentExe] c:\PROGRA~1\mcafee.com\agent\mcagent.exe
O4 - HKLM\..\Run: [MCUpdateExe] c:\PROGRA~1\mcafee.com\agent\mcupdate.exe
O4 - HKLM\..\Run: [CnxDslTaskBar] "C:\Program Files\ZyXEL\ADSL USB Modem\CnxDslTb.exe"
O4 - HKLM\..\Run: [NSLauncher] C:\Program Files\Nokia\Nokia Software

Launcher\NSLauncher.exe /startup
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 8.0

\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [iTunesHelper] "C:\Program Files\iTunes\iTunesHelper.exe"
O4 - HKCU\..\Run: [Nokia.PCSync] "D:\Program Files\Nokia\Nokia PC Suite 6\PCSync2.exe"

/NoDialog
O4 - Global Startup: Adobe Gamma Loader.lnk = C:\Program Files\Common

Files\Adobe\Calibration\Adobe Gamma Loader.exe
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Control Panel present
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~1

\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program

Files\Java\j2re1.4.2_05\bin\npjpi142_05.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} -

C:\Program Files\Java\j2re1.4.2_05\bin\npjpi142_05.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1

\MICROS~1\OFFICE11\REFIEBAR.DLL
O9 - Extra button: Yahoo! Messenger - {E5D12C4E-7B4F-11D3-B5C9-0050045C3C96} - D:\Program

Files\Yahoo!\Messenger\YahooMessenger.exe
O9 - Extra 'Tools' menuitem: Yahoo! Messenger - {E5D12C4E-7B4F-11D3-B5C9-0050045C3C96} -

D:\Program Files\Yahoo!\Messenger\YahooMessenger.exe
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program

Files\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} -

C:\Program Files\Messenger\msmsgs.exe
O17 - HKLM\System\CCS\Services\Tcpip\..\{F231B2EC-8D5F-4EB3-8980-CA7D99240A36}: NameServer

= 85.255.116.172 85.255.112.142
O23 - Service: Apple Mobile Device - Apple, Inc. - C:\Program Files\Common

Files\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
O23 - Service: HP WMI Interface (hpqwmi) - Hewlett-Packard Development Company, L.P. -

C:\Program Files\HPQ\SHARED\HPQWMI.exe
O23 - Service: iPod Service - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: McAfee WSC Integration (McDetect.exe) - McAfee, Inc - c:\program

files\mcafee.com\agent\mcdetect.exe
O23 - Service: McAfee.com McShield (McShield) - McAfee Inc. - c:\PROGRA~1

\mcafee.com\vso\mcshield.exe
O23 - Service: McAfee Task Scheduler (McTskshd.exe) - McAfee, Inc - c:\PROGRA~1

\mcafee.com\agent\mctskshd.exe
O23 - Service: McAfee SecurityCenter Update Manager (mcupdmgr.exe) - McAfee, Inc -

C:\PROGRA~1\McAfee.com\Agent\mcupdmgr.exe
O23 - Service: ServiceLayer - Nokia. - C:\Program Files\PC Connectivity

Solution\ServiceLayer.exe

--
End of file - 6190 bytes

Blade81
2008-11-12, 08:23
Hi

Uninstall old Java versions and get Java 6 Update 7 here (http://javadl.sun.com/webapps/download/AutoDL?BundleId=23111).

Uninstall old Adobe Reader versions and get the latest one here (http://www.filehippo.com/download_adobe_reader/) or get Foxit Reader here (http://www.foxitsoftware.com/pdf/reader_2/down_reader.htm).


Please download Malwarebytes' Anti-Malware (http://www.besttechie.net/tools/mbam-setup.exe) to your desktop.

Double-click mbam-setup.exe and follow the prompts to install the program.
At the end, be sure a checkmark is placed next to Update Malwarebytes' Anti-Malware and Launch Malwarebytes' Anti-Malware, then click Finish.
If an update is found, it will download and install the latest version.
Once the program has loaded, select Perform full scan, then click Scan.
When the scan is complete, click OK, then Show Results to view the results.
Be sure that everything is checked, and click Remove Selected.
When completed, a log will open in Notepad. Please save it to a convenient location. The log can also be found here: C:\Documents and Settings\Username\Application Data\Malwarebytes\Malwarebytes' Anti-Malware\Logs\log-date.txt
Please post contents of that file & a fresh hjt log in your next reply.

How do you connect into internet?

sribashyam
2008-11-12, 21:15
Hi,

I connect to the Internet using a Dial-up Broadband connection. I am using a Acer Laptop - Intel Celeron - IE 6.0.

As u said I replaced adobe reader with Foxit and removed Java and installed the newer version of Java.

When i ran the Malawres' Bytes Anti-Malaware it detected 5 items and i removed them all. The log is pasted below followd by the latest HJT log...

----------------
Malwarebytes' Anti-Malware 1.30
Database version: 1390
Windows 5.1.2600 Service Pack 2

11/13/2008 12:30:09 AM
mbam-log-2008-11-13 (00-30-09).txt

Scan type: Full Scan (C:\|D:\|)
Objects scanned: 86718
Time elapsed: 25 minute(s), 48 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 0
Registry Data Items Infected: 4
Folders Infected: 0
Files Infected: 1

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
(No malicious items detected)

Registry Values Infected:
(No malicious items detected)

Registry Data Items Infected:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\System (Rootkit.DNSChanger.H) -> Data: kdnxv.exe -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{f231b2ec-8d5f-4eb3-8980-ca7d99240a36}\NameServer (Trojan.DNSChanger) -> Data: 85.255.116.172 85.255.112.142 -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Interfaces\{f231b2ec-8d5f-4eb3-8980-ca7d99240a36}\NameServer (Trojan.DNSChanger) -> Data: 85.255.116.172 85.255.112.142 -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Services\Tcpip\Parameters\Interfaces\{3981f836-c74c-438d-bcf7-25a678282643}\DhcpNameServer (Trojan.DNSChanger) -> Data: 85.255.116.172,85.255.112.142 -> Quarantined and deleted successfully.

Folders Infected:
(No malicious items detected)

Files Infected:
C:\WINDOWS\system32\kdnxv.exe (Rootkit.DNSChanger.H) -> Delete on reboot.

--------------------------------
HJT Log - After running the above tool.

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 12:34:38 AM, on 11/13/2008
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)
Boot mode: Normal

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\services.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Common Files\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
c:\program files\mcafee.com\agent\mcdetect.exe
c:\PROGRA~1\mcafee.com\vso\mcshield.exe
c:\PROGRA~1\mcafee.com\agent\mctskshd.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\svchost.exe
c:\PROGRA~1\mcafee.com\vso\OasClnt.exe
C:\PROGRA~1\mcafee.com\vso\mcvsshld.exe
c:\program files\mcafee.com\agent\mcagent.exe
c:\progra~1\mcafee.com\vso\mcvsescn.exe
C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
C:\Program Files\HPQ\Quick Launch Buttons\EabServr.exe
C:\Program Files\Common Files\Sonic\Update Manager\sgtray.exe
C:\WINDOWS\system32\hkcmd.exe
C:\WINDOWS\SOUNDMAN.EXE
C:\Program Files\ZyXEL\ADSL USB Modem\CnxDslTb.exe
C:\Program Files\iTunes\iTunesHelper.exe
C:\Program Files\Java\jre1.6.0_07\bin\jusched.exe
C:\WINDOWS\system32\wuauclt.exe
C:\Program Files\iPod\bin\iPodService.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe
C:\WINDOWS\system32\wuauclt.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.yahoo.com/
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program

Files\Java\jre1.6.0_07\bin\ssv.dll
O3 - Toolbar: McAfee VirusScan - {BA52B914-B692-46c4-B683-905236F6F655} - c:\progra~1

\mcafee.com\vso\mcvsshl.dll
O4 - HKLM\..\Run: [SynTPLpr] C:\Program Files\Synaptics\SynTP\SynTPLpr.exe
O4 - HKLM\..\Run: [SynTPEnh] C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [eabconfg.cpl] C:\Program Files\HPQ\Quick Launch Buttons\EabServr.exe

/Start
O4 - HKLM\..\Run: [UpdateManager] "C:\Program Files\Common Files\Sonic\Update

Manager\sgtray.exe" /r
O4 - HKLM\..\Run: [IgfxTray] C:\WINDOWS\system32\igfxtray.exe
O4 - HKLM\..\Run: [HotKeysCmds] C:\WINDOWS\system32\hkcmd.exe
O4 - HKLM\..\Run: [SoundMan] SOUNDMAN.EXE
O4 - HKLM\..\Run: [VSOCheckTask] "C:\PROGRA~1\McAfee.com\VSO\mcmnhdlr.exe" /checktask
O4 - HKLM\..\Run: [VirusScan Online] C:\Program Files\McAfee.com\VSO\mcvsshld.exe
O4 - HKLM\..\Run: [OASClnt] C:\Program Files\McAfee.com\VSO\oasclnt.exe
O4 - HKLM\..\Run: [MCAgentExe] c:\PROGRA~1\mcafee.com\agent\mcagent.exe
O4 - HKLM\..\Run: [MCUpdateExe] C:\PROGRA~1\mcafee.com\agent\McUpdate.exe
O4 - HKLM\..\Run: [CnxDslTaskBar] "C:\Program Files\ZyXEL\ADSL USB Modem\CnxDslTb.exe"
O4 - HKLM\..\Run: [NSLauncher] C:\Program Files\Nokia\Nokia Software

Launcher\NSLauncher.exe /startup
O4 - HKLM\..\Run: [iTunesHelper] "C:\Program Files\iTunes\iTunesHelper.exe"
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre1.6.0_07\bin\jusched.exe"
O4 - Global Startup: Adobe Gamma Loader.lnk = C:\Program Files\Common

Files\Adobe\Calibration\Adobe Gamma Loader.exe
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Control Panel present
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~1

\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program

Files\Java\jre1.6.0_07\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} -

C:\Program Files\Java\jre1.6.0_07\bin\ssv.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1

\MICROS~1\OFFICE11\REFIEBAR.DLL
O9 - Extra button: Yahoo! Messenger - {E5D12C4E-7B4F-11D3-B5C9-0050045C3C96} - D:\Program

Files\Yahoo!\Messenger\YahooMessenger.exe
O9 - Extra 'Tools' menuitem: Yahoo! Messenger - {E5D12C4E-7B4F-11D3-B5C9-0050045C3C96} -

D:\Program Files\Yahoo!\Messenger\YahooMessenger.exe
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program

Files\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} -

C:\Program Files\Messenger\msmsgs.exe
O23 - Service: Apple Mobile Device - Apple, Inc. - C:\Program Files\Common

Files\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
O23 - Service: HP WMI Interface (hpqwmi) - Hewlett-Packard Development Company, L.P. -

C:\Program Files\HPQ\SHARED\HPQWMI.exe
O23 - Service: iPod Service - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: McAfee WSC Integration (McDetect.exe) - McAfee, Inc - c:\program

files\mcafee.com\agent\mcdetect.exe
O23 - Service: McAfee.com McShield (McShield) - McAfee Inc. - c:\PROGRA~1

\mcafee.com\vso\mcshield.exe
O23 - Service: McAfee Task Scheduler (McTskshd.exe) - McAfee, Inc - c:\PROGRA~1

\mcafee.com\agent\mctskshd.exe
O23 - Service: McAfee SecurityCenter Update Manager (mcupdmgr.exe) - McAfee, Inc -

C:\PROGRA~1\McAfee.com\Agent\mcupdmgr.exe
O23 - Service: ServiceLayer - Nokia. - C:\Program Files\PC Connectivity

Solution\ServiceLayer.exe

--
End of file - 5280 bytes


Please tell me what was the problem, how does the Malaware Bytes' tool help us? Is it useful to detect all malawares ??

Thank u...

Blade81
2008-11-13, 09:07
Hi


Please tell me what was the problem, how does the Malaware Bytes' tool help us? Is it useful to detect all malawares ??
The problem was that your internet connection was routed thru bad DNS servers causing redirections. You may use Malwarebytes' Anti-Malware as your antispyware tool.


Well congrats, it appears your system is all clean Are you still noticing any problems? If not, it's time to secure your system to prevent against further intrusions.


THESE STEPS ARE VERY IMPORTANT

Let's reset system restore
Reset and Re-enable your System Restore to remove infected files that have been backed up by Windows. The files in System Restore are protected to prevent any programs changing those files. This is the only way to clean these files: You will lose all previous restore points which are likely to be infected. Please note you need Administrator Access to do clean the restore points.

1. Turn off System Restore.
On the Desktop, right-click My Computer.
Click Properties.
Click the System Restore tab.
Check Turn off System Restore.
Click Apply, and then click OK.

2. Reboot.

3. Turn ON System Restore.
On the Desktop, right-click My Computer.
Click Properties.
Click the System Restore tab.
UN-Check *Turn off System Restore*.
Click Apply, and then click OK.
NOTE: only do this ONCE,NOT on a regular basis




UPDATING WINDOWS AND INTERNET EXPLORER

IMPORTANT: You Need to Update Windows and Internet Explorer to protect your computer from the malware that is around on the Internet. Please go to the windows update site (http://windowsupdate.microsoft.com/) to get the critical updates.

If you are running Microsoft Office, or any portion thereof, go to the Microsoft's Office Update site and make sure you have at least all the critical updates installed (Free) Microsoft Office Update.


Make your Internet Explorer more secure

This can be done by following these simple instructions:
From within Internet Explorer click on the Tools menu and then click on Options.
Click once on the Security tab
Click once on the Internet icon so it becomes highlighted.
Click once on the Custom Level button.
Change the Download signed ActiveX controls to Prompt
Change the Download unsigned ActiveX controls to Disable
Change the Initialize and script ActiveX controls not marked as safe to Disable
Change the Installation of desktop items to Prompt
Change the Launching programs and files in an IFRAME to Prompt
Change the Navigate sub-frames across different domains to Prompt
When all these settings have been made, click on the OK button.
If it prompts you as to whether or not you want to save the settings, press the Yes button.
Next press the Apply button and then the OK to exit the Internet Properties page.



The following are recommended third party programs that are designed to keep your computer clean. A link as well as a brief description is included with each item.


Download SpywareBlaster
Spyware blaster is a program that stops known malicious activex controls from installing on your computer. It works by changing settings in your registry. It makes
kill bits
in the registry, so that certain activex controls can't install.
If you don't know what activex controls are, see here (http://www.webopedia.com/TERM/A/ActiveX_control.html)
You can download SpywareBlaster here here (http://majorgeeks.com/downloadget.php?id=2859&file=11&evp=61b0e8ad41924a03c37615f4682b4cef)
SpywareBlaster tutorial (http://www.bleepingcomputer.com/forums/tutorial49.html)

hosts file:
Every version of windows has a hosts file as part of them. In a very basic sense, they are used to locate webpages. We can customize a hosts file so that it blocks certain webpages. However, it can slow down certain computers. This is why using a hosts file is optional!!
Download it here (http://www.mvps.org/winhelp2002/hosts.htm). Make sure you read the instructions on how to install the hosts file. There is a good tutorial here (http://www.bleepingcomputer.com/forums/tutorial51.html)
If you decide to download the hosts file, the slowdown problems can usually be avoided by following these steps:
Click the start button (at the lower left hand corner of your screen) Click run In the dialog box, type services.msc hit enter, then locate dns client Highlight it, then double-click it. On the dropdown box, change the setting from automatic to manual. Click ok

Use a Firewall - I can not stress how important it is that you use a Firewall on your computer. Without a firewall your computer is susceptible to being hacked and taken over. Simply using a Firewall in its default configuration can lower your risk greatly. For more info, check this (http://www.bleepingcomputer.com/forums/tutorial60.html) webpage out.
See here (http://www.freebyte.com/antivirus/#firewalls) to choose one if you don't have a 3rd party firewall.



Just a final reminder for you. I am trying to stress these two points.
UPDATE UPDATE UPDATE!!! Make sure you do this about every 1-2 weeks.
Make sure all of your security programs are up to date.
Visit Microsoft's Windows Update Site Frequently - It is important that you visit http://www.windowsupdate.com regularly. This will ensure your computer has always the latest security updates available installed on your computer. If there are new updates to install, install them immediately, reboot your computer, and revisit the site until there are no more critical updates.



Once again, please post and tell me how things are going with your system... problems etc.

Have a great day,
Blade :cool: