After attempting to clear my computer with Ad-Ware, AVG Anti-spy, spybot, mcafee, and spyware doctor, I've decided that I need some expert help.

AVG reports the infection as Downloader.agent.bhp, but rebooting as required does not clear the system. Kaspersky reports two infections, Trojan-Downloader.win32.agent.hbp once, and Spamtool.win32.agent.et twice. My CPU is running at 100% all the time.

As requested, here is the HJT log:

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 9:05:57 PM, on 2/4/2008
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16574)
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\Grisoft\AVG Anti-Spyware 7.5\guard.exe
C:\WINDOWS\eHome\ehRecvr.exe
C:\WINDOWS\eHome\ehSched.exe
C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
C:\Program Files\Common Files\LightScribe\LSSrvc.exe
C:\Program Files\Common Files\McAfee\HackerWatch\HWAPI.exe
C:\PROGRA~1\McAfee\MSC\mcmscsvc.exe
c:\PROGRA~1\COMMON~1\mcafee\mna\mcnasvc.exe
C:\PROGRA~1\McAfee\VIRUSS~1\mcods.exe
C:\PROGRA~1\McAfee\MSC\mcpromgr.exe
c:\PROGRA~1\COMMON~1\mcafee\mcproxy\mcproxy.exe
c:\PROGRA~1\COMMON~1\mcafee\redirsvc\redirsvc.exe
C:\PROGRA~1\McAfee\VIRUSS~1\mcshield.exe
C:\PROGRA~1\McAfee\VIRUSS~1\mcsysmon.exe
C:\Program Files\McAfee\MPF\MPFSrv.exe
C:\PROGRA~1\McAfee\MPS\mps.exe
C:\WINDOWS\system32\HPZipm12.exe
C:\Program Files\Spyware Doctor\svcntaux.exe
C:\Program Files\Spyware Doctor\swdsvc.exe
C:\Program Files\McAfee\MPS\mpsevh.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Spyware Doctor\SDTrayApp.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\ehome\mcrdsvc.exe
C:\Program Files\Hewlett-Packard\Shared\hpqwmiex.exe
C:\WINDOWS\system32\dllhost.exe
c:\PROGRA~1\mcafee.com\agent\mcagent.exe
C:\WINDOWS\System32\alg.exe
C:\WINDOWS\ehome\ehtray.exe
C:\Program Files\Java\jre1.6.0_03\bin\jusched.exe
C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
C:\Program Files\HP\QuickPlay\QPService.exe
C:\Program Files\HPQ\Quick Launch Buttons\EabServr.exe
C:\Program Files\Common Files\InstallShield\UpdateService\issch.exe
C:\Program Files\Hp\HP Software Update\HPWuSchd2.exe
C:\Program Files\iTunes\iTunesHelper.exe
C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\avgas.exe
C:\WINDOWS\eHome\ehmsas.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\The Weather Channel FW\Desktop Weather\DesktopWeather.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Google\Google Updater\GoogleUpdater.exe
C:\WINDOWS\system32\wbem\wmiprvse.exe
C:\Program Files\WinZip\WZQKPICK.EXE
C:\Program Files\iPod\bin\iPodService.exe
C:\Program Files\HP\Digital Imaging\bin\hpqimzone.exe
C:\PROGRA~1\COMMON~1\McAfee\EmProxy\emproxy.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe
C:\WINDOWS\system32\wbem\wmiprvse.exe

R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://go.microsoft.com/fwlink/?LinkId=54896
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKCU\Software\Microsoft\Internet Connection Wizard,ShellNext = http://ie.redirect.hp.com/svs/rdr?TY...lion&pf=laptop
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.6.0_03\bin\ssv.dll
O2 - BHO: scriptproxy - {7DB2D5A0-7241-4E79-B68D-6309F01C5231} - c:\PROGRA~1\mcafee\VIRUSS~1\scriptcl.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program files\google\googletoolbar2.dll
O2 - BHO: Google Toolbar Notifier BHO - {AF69DE43-7D58-4638-B6FA-CE66B5AD205D} - C:\Program Files\Google\GoogleToolbarNotifier\2.1.615.5858\swg.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar2.dll
O4 - HKLM\..\Run: [ehTray] C:\WINDOWS\ehome\ehtray.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre1.6.0_03\bin\jusched.exe"
O4 - HKLM\..\Run: [SynTPEnh] C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
O4 - HKLM\..\Run: [QPService] "C:\Program Files\HP\QuickPlay\QPService.exe"
O4 - HKLM\..\Run: [eabconfg.cpl] "C:\Program Files\HPQ\Quick Launch Buttons\EabServr.exe" /Start
O4 - HKLM\..\Run: [Cpqset] C:\Program Files\HPQ\Default Settings\cpqset.exe
O4 - HKLM\..\Run: [RecGuard] C:\Windows\SMINST\RecGuard.exe
O4 - HKLM\..\Run: [ISUSPM Startup] "C:\PROGRA~1\COMMON~1\INSTAL~1\UPDATE~1\ISUSPM.exe" -startup
O4 - HKLM\..\Run: [ISUSScheduler] "C:\Program Files\Common Files\InstallShield\UpdateService\issch.exe" -start
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 8.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [HP Software Update] C:\Program Files\Hp\HP Software Update\HPWuSchd2.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\QTTask.exe" -atboottime
O4 - HKLM\..\Run: [iTunesHelper] "C:\Program Files\iTunes\iTunesHelper.exe"
O4 - HKLM\..\Run: [SDTray] "C:\Program Files\Spyware Doctor\SDTrayApp.exe"
O4 - HKLM\..\Run: [!AVG Anti-Spyware] "C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\avgas.exe" /minimized
O4 - HKCU\..\Run: [swg] C:\Program Files\Google\GoogleToolbarNotifier\GoogleToolbarNotifier.exe
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [DW4] "C:\Program Files\The Weather Channel FW\Desktop Weather\DesktopWeather.exe"
O4 - HKUS\S-1-5-18\..\Run: [Picasa Media Detector] C:\Program Files\Picasa2\PicasaMediaDetector.exe (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [Picasa Media Detector] C:\Program Files\Picasa2\PicasaMediaDetector.exe (User 'Default user')
O4 - Startup: PowerReg Scheduler.exe
O4 - Global Startup: Google Updater.lnk = C:\Program Files\Google\Google Updater\GoogleUpdater.exe
O4 - Global Startup: HP Photosmart Premier Fast Start.lnk = C:\Program Files\HP\Digital Imaging\bin\hpqthb08.exe
O4 - Global Startup: WinZip Quick Pick.lnk = C:\Program Files\WinZip\WZQKPICK.EXE
O8 - Extra context menu item: Add to Google Photos Screensa&ver - res://C:\WINDOWS\system32\GPhotos.scr/200
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~4\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_03\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_03\bin\ssv.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~4\OFFICE11\REFIEBAR.DLL
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.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
O14 - IERESET.INF: START_PAGE_URL=http://ie.redirect.hp.com/svs/rdr?TYPE=3&tp=iehome&locale=EN_US&c=Q106&bd=pavilion&pf=laptop
O16 - DPF: {0E5F0222-96B9-11D3-8997-00104BD12D94} (PCPitstop Utility) - http://www.pcpitstop.com/pcpitstop/PCPitStop.CAB
O16 - DPF: {49232000-16E4-426C-A231-62846947304B} (SysData Class) - http://ipgweb.cce.hp.com/rdqnbk/downloads/sysinfo.cab
O16 - DPF: {4ED9DDF0-7479-4BBE-9335-5A1EDB1D8A21} (McAfee.com Operating System Class) - http://download.mcafee.com/molbin/sh...1/mcinsctl.cab
O16 - DPF: {6B75345B-AA36-438A-BBE6-4078B4C6984D} (HpProductDetection Class) - http://h20270.www2.hp.com/ediags/gmn...tDetection.cab
O16 - DPF: {BCC0FF27-31D9-4614-A68E-C18E1ADA4389} (DwnldGroupMgr Class) - http://download.mcafee.com/molbin/sh...26/mcgdmgr.cab
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://fpdownload2.macromedia.com/ge...sh/swflash.cab
O23 - Service: Apple Mobile Device - Apple, Inc. - C:\Program Files\Common Files\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
O23 - Service: AVG Anti-Spyware Guard - GRISOFT s.r.o. - C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\guard.exe
O23 - Service: McAfee E-mail Proxy (Emproxy) - McAfee, Inc. - C:\PROGRA~1\COMMON~1\McAfee\EmProxy\emproxy.exe
O23 - Service: Google Updater Service (gusvc) - Google - C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: hpqwmiex - Hewlett-Packard Development Company, L.P. - C:\Program Files\Hewlett-Packard\Shared\hpqwmiex.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Common Files\InstallShield\Driver\1050\Intel 32\IDriverT.exe
O23 - Service: iPod Service - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: LightScribeService Direct Disc Labeling Service (LightScribeService) - Hewlett-Packard Company - C:\Program Files\Common Files\LightScribe\LSSrvc.exe
O23 - Service: McAfee HackerWatch Service - McAfee, Inc. - C:\Program Files\Common Files\McAfee\HackerWatch\HWAPI.exe
O23 - Service: McAfee Update Manager (mcmispupdmgr) - McAfee, Inc. - C:\PROGRA~1\McAfee\MSC\mcupdmgr.exe
O23 - Service: McAfee Services (mcmscsvc) - McAfee, Inc. - C:\PROGRA~1\McAfee\MSC\mcmscsvc.exe
O23 - Service: McAfee Network Agent (McNASvc) - McAfee, Inc. - c:\PROGRA~1\COMMON~1\mcafee\mna\mcnasvc.exe
O23 - Service: McAfee Scanner (McODS) - McAfee, Inc. - C:\PROGRA~1\McAfee\VIRUSS~1\mcods.exe
O23 - Service: McAfee Protection Manager (mcpromgr) - McAfee, Inc. - C:\PROGRA~1\McAfee\MSC\mcpromgr.exe
O23 - Service: McAfee Proxy Service (McProxy) - McAfee, Inc. - c:\PROGRA~1\COMMON~1\mcafee\mcproxy\mcproxy.exe
O23 - Service: McAfee Redirector Service (McRedirector) - McAfee, Inc. - c:\PROGRA~1\COMMON~1\mcafee\redirsvc\redirsvc.exe
O23 - Service: McAfee Real-time Scanner (McShield) - McAfee, Inc. - C:\PROGRA~1\McAfee\VIRUSS~1\mcshield.exe
O23 - Service: McAfee SystemGuards (McSysmon) - McAfee, Inc. - C:\PROGRA~1\McAfee\VIRUSS~1\mcsysmon.exe
O23 - Service: McAfee Personal Firewall Service (MpfService) - McAfee, Inc. - C:\Program Files\McAfee\MPF\MPFSrv.exe
O23 - Service: McAfee Privacy Service (MPS9) - McAfee, Inc. - C:\PROGRA~1\McAfee\MPS\mps.exe
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\system32\HPZipm12.exe
O23 - Service: PC Tools Auxiliary Service (sdAuxService) - PC Tools - C:\Program Files\Spyware Doctor\svcntaux.exe
O23 - Service: PC Tools Security Service (sdCoreService) - PC Tools - C:\Program Files\Spyware Doctor\swdsvc.exe

--
End of file - 11196 bytes

The Kaspersky Scan is too long to post in its entirety. I can post it next if needed. What follows is what I hope are the gory details--I deleted several lines that appeared innocuous to me. (I know, "a little knowledge is very dangerous.")

KASPERSKY ONLINE SCANNER REPORT
Tuesday, February 05, 2008 1:00:47 AM
Operating System: Microsoft Windows XP Professional, Service Pack 2 (Build 2600)
Kaspersky Online Scanner version: 5.0.98.0
Kaspersky Anti-Virus database last update: 5/02/2008
Kaspersky Anti-Virus database records: 548717
-------------------------------------------------------------------------------

Scan Settings:
Scan using the following antivirus database: extended
Scan Archives: true
Scan Mail Bases: true

Scan Target - My Computer:
C:\
D:\
E:\

Scan Statistics:
Total number of scanned objects: 105355
Number of viruses found: 3
Number of infected objects: 3
Number of suspicious objects: 0
Duration of the scan process: 03:01:14

Infected Object Name / Virus Name / Last Action
C:\Documents and Settings\All Users\Application Data\McAfee\MNA\NAData Object is locked skipped
C:\Documents and Settings\All Users\Application Data\McAfee\MPF\data\log.edb Object is locked skipped
C:\Documents and Settings\All Users\Application Data\McAfee\MSC\Logs\Events.dat Object is locked skipped
C:\Documents and Settings\All Users\Application Data\McAfee\MSC\Logs\{29252DC2-422E-4087-819C-5A9DC597146A}.log Object is locked skipped
C:\Documents and Settings\All Users\Application Data\McAfee\MSC\Logs\{D912C9BA-92AA-4E24-8125-FC903DCFCF56}.log Object is locked skipped
C:\Documents and Settings\All Users\Application Data\McAfee\MSC\McUsers.dat Object is locked skipped
C:\Documents and Settings\All Users\Application Data\McAfee\VirusScan\Data\TFR1.tmp Object is locked skipped
C:\Documents and Settings\All Users\Application Data\McAfee\VirusScan\Logs\OAS.Log Object is locked skipped
C:\Documents and Settings\All Users\Application Data\Microsoft\eHome\logs\ehRecvr.log Object is locked skipped
C:\Documents and Settings\All Users\Application Data\Microsoft\Network\Downloader\qmgr0.dat Object is locked skipped
C:\Documents and Settings\All Users\Application Data\Microsoft\Network\Downloader\qmgr1.dat Object is locked skipped
C:\Documents and Settings\All Users\Application Data\muvee Technologies\030625\0102\0314\values Object is locked skipped
C:\Documents and Settings\Colleen\Cookies\index.dat Object is locked skipped
C:\Documents and Settings\Colleen\Local Settings\Application Data\ApplicationHistory\hpqimzone.exe.3204510e.ini.inuse Object is locked skipped
C:\Documents and Settings\Colleen\Local Settings\Application Data\HP\Digital Imaging\db\administrativeInfo.dbf Object is locked skippedImaging\db\propertiesTable.cdx Object is locked skipped
C:\Documents and Settings\Colleen\Local Settings\Application Data\HP\Digital Imaging\db\propertiesTable.dbf Object is locked skipped
C:\Documents and Settings\Colleen\Local Settings\Application Data\HP\Digital Imaging\db\ROFImagesTable.cdx Object is locked skipped
C:\Documents and Settings\Colleen\Local Settings\Application Data\HP\Digital Imaging\db\ROFImagesTable.dbf Object is locked skipped
C:\Documents and Settings\Colleen\Local Settings\Application Data\HP\Digital Imaging\db\ROFTable.cdx Object is locked skipped
C:\Documents and Settings\Colleen\Local Settings\Application Data\HP\Digital Imaging\db\ROFTable.dbf Object is locked skipped
C:\Documents and Settings\Colleen\Local Settings\Application Data\Microsoft\Feeds Cache\index.dat Object is locked skipped
C:\Documents and Settings\Colleen\Local Settings\Application Data\Microsoft\Windows\UsrClass.dat Object is locked skipped
C:\Documents and Settings\Colleen\Local Settings\Application Data\Microsoft\Windows\UsrClass.dat.LOG Object is locked skipped
C:\Documents and Settings\Colleen\Local Settings\History\History.IE5\index.dat Object is locked skipped
C:\Documents and Settings\Colleen\Local Settings\History\History.IE5\MSHist012008020420080205\index.dat Object is locked skipped
C:\Documents and Settings\Colleen\Local Settings\Temp\~DF8821.tmp Object is locked skipped
C:\Documents and Settings\Colleen\Local Settings\Temporary Internet Files\AntiPhishing\B3BB5BBA-E7D5-40AB-A041-A5B1C0B26C8F.dat Object is locked skipped
C:\Documents and Settings\Colleen\Local Settings\Temporary Internet Files\Content.IE5\index.dat Object is locked skipped
C:\Documents and Settings\Colleen\ntuser.dat Object is locked skipped
C:\Documents and Settings\Colleen\ntuser.dat.LOG Object is locked skipped
C:\Documents and Settings\LocalService\Cookies\index.dat Object is locked skipped
C:\Documents and Settings\LocalService\Local Settings\Application Data\Microsoft\Windows\UsrClass.dat Object is locked skipped
C:\Documents and Settings\LocalService\Local Settings\Application Data\Microsoft\Windows\UsrClass.dat.LOG Object is locked skipped
C:\Documents and Settings\LocalService\Local Settings\History\History.IE5\index.dat Object is locked skipped
C:\Documents and Settings\LocalService\Local Settings\Temporary Internet Files\Content.IE5\index.dat Object is locked skipped
C:\Documents and Settings\LocalService\NTUSER.DAT Object is locked skipped
C:\Documents and Settings\LocalService\ntuser.dat.LOG Object is locked skipped
C:\Documents and Settings\NetworkService\Cookies\index.dat Object is locked skipped
C:\Documents and Settings\NetworkService\Local Settings\Application Data\Microsoft\Windows\UsrClass.dat Object is locked skipped
C:\Documents and Settings\NetworkService\Local Settings\Application Data\Microsoft\Windows\UsrClass.dat.LOG Object is locked skipped
C:\Documents and Settings\NetworkService\Local Settings\History\History.IE5\index.dat Object is locked skipped
C:\Documents and Settings\NetworkService\Local Settings\Temporary Internet Files\Content.IE5\index.dat Object is locked skipped
C:\Documents and Settings\NetworkService\NTUSER.DAT Object is locked skipped
C:\Documents and Settings\NetworkService\ntuser.dat.LOG Object is locked skipped
C:\qoobox\Quarantine\C\WINDOWS\system32\drivers\mmsciclx.dat.vir Object is locked skipped
C:\System Volume Information\_restore{BFAA719B-281F-45B6-9E39-9D4BB578C2A4}\RP486\A0051590.dll Infected: SpamTool.Win32.Agent.eh skipped
C:\System Volume Information\_restore{BFAA719B-281F-45B6-9E39-9D4BB578C2A4}\RP488\change.log Object is locked skipped
C:\WINDOWS\Debug\PASSWD.LOG Object is locked skipped
C:\WINDOWS\ModemLog_AC97 Soft Data Fax Modem with SmartCP.txt Object is locked skipped
C:\WINDOWS\Registration\{02D4B3F1-FD88-11D1-960D-00805FC79235}.{F15751E4-CD17-4521-AA1A-D282536D367C}.crmlog Object is locked skipped
C:\WINDOWS\SchedLgU.Txt Object is locked skipped
C:\WINDOWS\SoftwareDistribution\ReportingEvents.log Object is locked skipped
C:\WINDOWS\Sti_Trace.log Object is locked skipped
C:\WINDOWS\system32\AppCert\prx93f_.dll Infected: SpamTool.Win32.Agent.et skipped
C:\WINDOWS\system32\AppCert\wsil32.dll Infected: Trojan-Downloader.Win32.Agent.hbp skipped
C:\WINDOWS\system32\CatRoot2\edb.log Object is locked skipped
C:\WINDOWS\system32\CatRoot2\tmp.edb Object is locked skipped
Scan process completed.


Spybot scan was clean, BTW.
I'd be grateful for any help you can provide!