Thanks to the excellent support here, I've been able to keep my rigs clean for years. But I've picked up some pesky adware and I knew where to come for help.

I've run my avast! scanner, Ad-Adware and Registry Mechanic. Keeps regenerating.
Here's the log. Thanks!
Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 10:20:02 AM, on 5/10/2008
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16640)
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:\Program Files\Windows Defender\MsMpEng.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Lavasoft\Ad-Aware 2007\aawservice.exe
C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
C:\Program Files\Alwil Software\Avast4\ashServ.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Common Files\Autodesk Shared\Service\AdskScSrv.exe
C:\Program Files\Symantec\LiveUpdate\ALUSchedulerSvc.exe
C:\WINDOWS\System32\DRIVERS\CDANTSRV.EXE
C:\Program Files\ewido\security suite\ewidoctrl.exe
C:\Program Files\Autodesk\3dsMax8\mentalray\satellite\raysat_3dsmax8server.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\Program Files\Autodesk\3dsMax8\plugins\Brazil\sfmgr\sfmgr.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Common Files\Symantec Shared\CCPD-LC\symlcsvc.exe
C:\Program Files\Viewpoint\Common\ViewpointService.exe
C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
C:\Program Files\TortoiseSVN\bin\TSVNCache.exe
C:\Program Files\HP\Digital Imaging\Unload\hpqcmon.exe
C:\Program Files\Musicmatch\Musicmatch Jukebox\mm_tray.exe
C:\Program Files\QuickTime\qttask.exe
C:\Program Files\Common Files\Real\Update_OB\realsched.exe
C:\Program Files\Windows Defender\MSASCui.exe
C:\Program Files\Java\jre1.6.0_02\bin\jusched.exe
C:\WINDOWS\ALCXMNTR.EXE
C:\WINDOWS\system32\RunDLL32.exe
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\Program Files\Logitech\MouseWare\system\em_exec.exe
C:\Program Files\Hewlett-Packard\HP Connections XP\HPConnectionsXP.exe
C:\WINDOWS\System32\Rundll32.exe
C:\Program Files\Messenger\msmsgs.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Documents and Settings\Owner\Local Settings\Application Data\Google\Update\1.1.25.0\GoogleUpdate.exe
C:\Program Files\Internet Explorer\IEXPLORE.EXE
C:\Program Files\HP\Digital Imaging\bin\hpqtra08.exe
C:\Documents and Settings\Owner\Local Settings\Application Data\YouTube\Uploader\youtubeuploader.exe
C:\Program Files\Viewpoint\Viewpoint Manager\ViewMgr.exe
C:\Program Files\Outlook Express\msimn.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page =
http://www.adelphia.net
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://www.adelphia.net
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page =
R1 - HKCU\Software\Microsoft\Internet Connection Wizard,ShellNext =
http://www.adelphia.com/
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = localhost
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 6.0\Reader\ActiveX\AcroIEHelper.dll
O2 - BHO: cpmsky browser optimizer - {2fdd3ba7-2410-f0d5-5425-03b0a5b666d9} - C:\WINDOWS\system32\{f73c7c03-f7ec-5cda-b01d-81cd83fb63cd}.dll
O2 - BHO: adzgalore - {47629744-cd2b-f173-1468-c94d23a859a4} - C:\WINDOWS\system32\nsh239.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.6.0_02\bin\ssv.dll
O4 - HKLM\..\Run: [HotKeysCmds] C:\WINDOWS\System32\hkcmd.exe
O4 - HKLM\..\Run: [CamMonitor] c:\Program Files\HP\Digital Imaging\Unload\hpqcmon.exe
O4 - HKLM\..\Run: [UpdateManager] "C:\Program Files\Common Files\Sonic\Update Manager\sgtray.exe" /r
O4 - HKLM\..\Run: [MMTray] C:\Program Files\Musicmatch\Musicmatch Jukebox\mm_tray.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [Logitech Utility] Logi_MwX.Exe
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [Windows Defender] "C:\Program Files\Windows Defender\MSASCui.exe" -hide
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre1.6.0_02\bin\jusched.exe"
O4 - HKLM\..\Run: [AlcxMonitor] ALCXMNTR.EXE
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [NvMediaCenter] RunDLL32.exe NvMCTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [HPConnectionsXP c5abd8b1-0f62-43f4-a9b8-938e04bb517e] C:\Program Files\Hewlett-Packard\HP Connections XP\HPConnectionsXP.exe
O4 - HKLM\..\Run: [{011b5f88-8944-f712-436d-232c010f7fa0}] C:\WINDOWS\System32\Rundll32.exe "C:\WINDOWS\system32\{f73c7c03-f7ec-5cda-b01d-81cd83fb63cd}.dll" DllInit
O4 - HKCU\..\Run: [MSMSGS] "C:\Program Files\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [Google Update] "C:\Documents and Settings\Owner\Local Settings\Application Data\Google\Update\1.1.25.0\GoogleUpdate.exe" /lang en
O4 - Startup: YouTube Uploader.lnk = C:\Documents and Settings\Owner\Local Settings\Application Data\YouTube\Uploader\youtubeuploader.exe
O4 - Global Startup: Adobe Gamma Loader.lnk = C:\Program Files\Common Files\Adobe\Calibration\Adobe Gamma Loader.exe
O4 - Global Startup: HP Digital Imaging Monitor.lnk = C:\Program Files\HP\Digital Imaging\bin\hpqtra08.exe
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MI1933~1\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_02\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_02\bin\ssv.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MI1933~1\OFFICE11\REFIEBAR.DLL
O9 - Extra button: AIM - {AC9E2541-2814-11d5-BC6D-00B0D0A1DE45} - C:\Program Files\AIM\aim.exe
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
O16 - DPF: {03F998B2-0E00-11D3-A498-00104B6EB52E} (MetaStreamCtl Class) -
https://components.viewpoint.com/MTS...n/troyer2.html
O16 - DPF: {67A5F8DC-1A4B-4D66-9F24-A704AD929EEE} (System Requirements Lab) -
http://www.nvidia.com/content/Driver...sysreqlab2.cab
O16 - DPF: {67DABFBF-D0AB-41FA-9C46-CC0F21721616} -
http://download.divx.com/player/DivXBrowserPlugin.cab
O16 - DPF: {AB86CE53-AC9F-449F-9399-D8ABCA09EC09} (Get_ActiveX Control) -
https://h17000.www1.hp.com/ewfrf-JAV...oadManager.ocx
O17 - HKLM\System\CCS\Services\Tcpip\..\{288F44C1-8693-4547-B4EA-A18A74456ECC}: NameServer = 192.168.1.1
O17 - HKLM\System\CS1\Services\Tcpip\..\{288F44C1-8693-4547-B4EA-A18A74456ECC}: NameServer = 192.168.1.1
O17 - HKLM\System\CS2\Services\Tcpip\..\{288F44C1-8693-4547-B4EA-A18A74456ECC}: NameServer = 192.168.1.1
O23 - Service: Ad-Aware 2007 Service (aawservice) - Lavasoft - C:\Program Files\Lavasoft\Ad-Aware 2007\aawservice.exe
O23 - Service: Adobe LM Service - Adobe Systems - C:\Program Files\Common Files\Adobe Systems Shared\Service\Adobelmsvc.exe
O23 - Service: ASP.NET State Service (aspnet_state) - Unknown owner - C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\aspnet_state.exe (file missing)
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - ALWIL Software - C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: Autodesk Licensing Service - Autodesk - C:\Program Files\Common Files\Autodesk Shared\Service\AdskScSrv.exe
O23 - Service: Automatic LiveUpdate Scheduler - Symantec Corporation - C:\Program Files\Symantec\LiveUpdate\ALUSchedulerSvc.exe
O23 - Service: avast! Antivirus - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
O23 - Service: avast! Web Scanner - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
O23 - Service: C-DillaSrv - C-Dilla Ltd - C:\WINDOWS\System32\DRIVERS\CDANTSRV.EXE
O23 - Service: Symantec Lic NetConnect service (CLTNetCnService) - Unknown owner - C:\Program Files\Common Files\Symantec Shared\ccSvcHst.exe (file missing)
O23 - Service: ewido security suite control - ewido networks - C:\Program Files\ewido\security suite\ewidoctrl.exe
O23 - Service: LiveUpdate - Symantec Corporation - C:\PROGRA~1\Symantec\LIVEUP~1\LUCOMS~1.EXE
O23 - Service: RaySat_3dsmax8 Server (mi-raysat_3dsmax8) - Unknown owner - C:\Program Files\Autodesk\3dsMax8\mentalray\satellite\raysat_3dsmax8server.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: CaReTaKeR-CT NetMgr 1.2.1 (sfmgr) - Unknown owner - C:\Program Files\Autodesk\3dsMax8\plugins\Brazil\sfmgr\sfmgr.exe
O23 - Service: Symantec Core LC - Unknown owner - C:\Program Files\Common Files\Symantec Shared\CCPD-LC\symlcsvc.exe
O23 - Service: Viewpoint Manager Service - Viewpoint Corporation - C:\Program Files\Viewpoint\Common\ViewpointService.exe
--
End of file - 10213 bytes