Until its clean you should use this computer as little as possible and when not in use it should have no connectivity, If your not sure how to stop the connectivity then I would power it off.
Pretty sure you have a rootkit on your machine. They hide malicious files and components from traditional antivirus/antimalware software. Rootkits bury themselves deep in the operating system. Special software is needed to detect and remove them. Even if symptoms are gone and logs are clean its still not a 100% guarantee that your machine is clean once a rootkit has been detected and removed. You should consider a complete reformat/reinstall of Windows as an option.
The best source for information on how to do this would be the computer manufacturers website.
To clean up the machine with current utilities proceed as follows:
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I know you ran tdsskiller once, delete that icon and get a new copy. Post the log even if it finds nothing:
1) Please download TDSS Killer.exe and save it to your desktop
TDSS Killer.exe
Double click to launch the utility. After it initializes click the start scan button.
Once the scan completes you can click the continue button.
"The utility will automatically select an action (Cure or Delete) for known malcious objects. A suspicious object will be skipped by default."
"After clicking Next, the utility applies selected actions and outputs the result."
"A reboot might require after disinfection."
A report will be found in your Root drive Local Disk (C) as TDSSKiller.2.4.12.0_02.01.2011_17.32.21_log.txt (name, version, date, time, log.txt)
Please post the log report
2) Please download aswMBR to your desktop.
http://public.avast.com/~gmerek/aswMBR.exe
* Double click the aswMBR icon to run it. A window will open
* Click the SCAN button to start scan. When its done will say: "scan finished successfully"
* Next press the SAVE LOG button, save the logfile to your desktop and post its contents in your next reply. Click the EXIT button to close.
Did you get Antivirus yet?
After you run the two utilities above you can use combofix:
Click Start, then Run and type Notepad and click OK.
Copy/paste the text in the code box below into notepad:
Code:
File::
c:\documents and settings\User\Start Menu\Programs\Startup\huvqmjng.exe
Name the Notepad file CFScript.txt and Save it to your desktop.
now locate the file you just saved and the combofix icon, both on your desktop
using your mouse drag the CFScript right on top of the combofix icon and release, combofix will run and produce a new log
please post the new combofix log as well as the two logs from above