I'm infected with something

[Tweek_1984]

Today I logged on and when I fired up Firefox and clicked on a Google link it redirected me to marketing websites.

AVG then fired up and asked me to uninstall, I thought it was trying to update. However, once I'd rebooted and fired up firefox, I realised it must be a virus. I then couldn't download anything either. Everything I downloaded was completed at 0kb. After finally managing to download AVG, I ran a scan and it found a number of trojans and cookie threats. But these keep on coming back. More recently whenever I fire up firefox, it gives me a 404 and says a firewall isn't letting firefox use one of it's proxy ports? I have to go in and manually change firefox to auto-detect these settings. But this happens everytime I open firefox.

I've scanned with Malwarebytes Anti-Malware, Spybot search & destroy, AVG latest update, Trend micro housecall, and others, and I cant seem to resolve this problem. Firefox is still 404'ing when I open, and when I do get connected, links are redirecting me. I'm also getting constact threat warnings from AVG about cookies detected.

Can anybody help?

Here's my hijackthis log:

Logfile of Trend Micro HijackThis v2.0.4
Scan saved at 17:21:30, on 04/12/2011
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP3 (6.00.2900.5512)
Boot mode: Normal

Running processes:
C:\WINDOWS\System32\smss.exe
C:\PROGRA~1\AVG\AVG2012\avgrsx.exe
C:\Program Files\AVG\AVG2012\avgcsrvx.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\services.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\ATI Technologies\ATI Control Panel\atiptaxx.exe
C:\Program Files\Synaptics\SynTP\SynTPLpr.exe
C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
C:\Program Files\hpq\HP Wireless Assistant\HP Wireless Assistant.exe
C:\WINDOWS\C0100Mon.exe
C:\WINDOWS\V0380Mon.exe
C:\Program Files\QuickTime\qttask.exe
C:\Program Files\DivX\DivX Update\DivXUpdate.exe
C:\Program Files\AVG\AVG2012\avgtray.exe
C:\Program Files\hott notes 4\hottnotes.exe
C:\Program Files\AVG\AVG2012\avgwdsvc.exe
C:\Program Files\Java\jre6\bin\jqs.exe
C:\Program Files\CDBurnerXP\NMSAccessU.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\AVG\AVG2012\AVGIDSAgent.exe
C:\Program Files\HPQ\shared\hpqwmi.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\msiexec.exe
C:\Program Files\Trend Micro\HiJackThis\HiJackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://search.conduit.com?SearchSource=10&ctid=CT2465030
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: Increase performance and video formats for your HTML5 <video> - {326E768D-4182-46FD-9C16-1449A49795F4} - C:\Program Files\DivX\DivX Plus Web Player\npdivx32.dll
O2 - BHO: WormRadar.com IESiteBlocker.NavFilter - {3CA2F312-6F6E-4B53-A66E-4E65E497C8C0} - C:\Program Files\AVG\AVG2012\avgssie.dll
O2 - BHO: Use the DivX Plus Web Player to watch web videos with less interruptions and smoother playback on supported sites - {593DDEC6-7468-4cdd-90E1-42DADAA222E9} - C:\Program Files\DivX\DivX Plus Web Player\npdivx32.dll
O2 - BHO: (no name) - {5C255C8A-E604-49b4-9D64-90988571CECB} - (no file)
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files\Java\jre6\bin\jp2ssv.dll
O2 - BHO: JQSIEStartDetectorImpl - {E7E6F031-17CE-4C07-BC86-EABFE594F69C} - C:\Program Files\Java\jre6\lib\deploy\jqs\ie\jqs_plugin.dll
O4 - HKLM\..\Run: [ATIPTA] C:\Program Files\ATI Technologies\ATI Control Panel\atiptaxx.exe
O4 - HKLM\..\Run: [Cpqset] C:\Program Files\HPQ\Default Settings\cpqset.exe
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: [hpWirelessAssistant] C:\Program Files\hpq\HP Wireless Assistant\HP Wireless Assistant.exe
O4 - HKLM\..\Run: [C0100Mon.exe] C:\WINDOWS\C0100Mon.exe
O4 - HKLM\..\Run: [V0380Mon.exe] C:\WINDOWS\V0380Mon.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [DivXUpdate] "C:\Program Files\DivX\DivX Update\DivXUpdate.exe" /CHECKNOW
O4 - HKLM\..\Run: [AVG_TRAY] "C:\Program Files\AVG\AVG2012\avgtray.exe"
O4 - HKCU\..\Run: [MsnMsgr] "C:\Program Files\MSN Messenger\MsnMsgr.Exe" /background
O4 - HKUS\S-1-5-19\..\RunOnce: [_nltide_3] rundll32 advpack.dll,LaunchINFSectionEx nLite.inf,C,,4,N (User 'LOCAL SERVICE')
O4 - HKUS\S-1-5-20\..\RunOnce: [_nltide_3] rundll32 advpack.dll,LaunchINFSectionEx nLite.inf,C,,4,N (User 'NETWORK SERVICE')
O4 - HKUS\S-1-5-18\..\RunOnce: [_nltide_3] rundll32 advpack.dll,LaunchINFSectionEx nLite.inf,C,,4,N (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\RunOnce: [_nltide_3] rundll32 advpack.dll,LaunchINFSectionEx nLite.inf,C,,4,N (User 'Default user')
O4 - Startup: hott notes 4.lnk = C:\Program Files\hott notes 4\hottnotes.exe
O4 - Global Startup: Adobe Reader Speed Launch.lnk = C:\Program Files\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O8 - Extra context menu item: Download with Mipony - file://C:\Program Files\MiPony\Browser\IEContext.htm
O8 - Extra context menu item: Download with Rapget - C:\Program Files\Rapget\rapget.htm
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~1\Office12\EXCEL.EXE/3000
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~1\Office12\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
O18 - Protocol: linkscanner - {F274614C-63F8-47D5-A4D1-FBDDE494F8D1} - C:\Program Files\AVG\AVG2012\avgpp.dll
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\COMMON~1\Skype\SKYPE4~1.DLL
O22 - SharedTaskScheduler: Browseui preloader - {438755C2-A8BA-11D1-B96B-00A0C90312E1} - C:\WINDOWS\system32\browseui.dll
O22 - SharedTaskScheduler: Component Categories cache daemon - {8C7461EF-2B13-11d2-BE35-3078302C2030} - C:\WINDOWS\system32\browseui.dll
O23 - Service: Ati HotKey Poller - ATI Technologies Inc. - C:\WINDOWS\system32\Ati2evxx.exe
O23 - Service: AVGIDSAgent - AVG Technologies CZ, s.r.o. - C:\Program Files\AVG\AVG2012\AVGIDSAgent.exe
O23 - Service: AVG WatchDog (avgwd) - AVG Technologies CZ, s.r.o. - C:\Program Files\AVG\AVG2012\avgwdsvc.exe
O23 - Service: HP WMI Interface (hpqwmi) - Hewlett-Packard Development Company, L.P. - C:\Program Files\HPQ\shared\hpqwmi.exe
O23 - Service: Java Quick Starter (JavaQuickStarterService) - Sun Microsystems, Inc. - C:\Program Files\Java\jre6\bin\jqs.exe
O23 - Service: NMSAccess - Unknown owner - C:\Program Files\CDBurnerXP\NMSAccessU.exe

--
End of file - 5973 bytes

[Mongrel]

Tweek_1984,

Please forgive me for the delayed reply.
Read THIS ANNOUNCEMENT to get HJT and malware assistance.

It is with deepest regrets we canot assist you here but have an alliance
with one of the best teams on the Internet (all instructions are in the announcement).

Best regards,
Mongrel