this is the log scan from hijackthis pls tell me solution to this


Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 3:40:26 PM, on 12/28/2009
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\system32\svchost.exe
C:\WINDOWS\Explorer.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\AhnRpta.exe
C:\Program Files\CONEXANT\SmartAudio\SmartAudio.exe
C:\Program Files\HP\HP Software Update\HPWuSchd2.exe
C:\Program Files\Messenger\msmsgs.exe
C:\WINDOWS\SVIQ.EXE
C:\WINDOWS\system\Fun.exe
C:\WINDOWS\dc.exe
C:\Program Files\HP\Digital Imaging\bin\hpqtra08.exe
C:\Program Files\HP\Digital Imaging\bin\hpqSTE08.exe
C:\WINDOWS\system32\wuauclt.exe
C:\Program Files\Yahoo!\Messenger\YahooMessenger.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe

F2 - REG:system.ini: Shell=Explorer.exe C:\WINDOWS\system32\WinSit.exe
F3 - REG:win.ini: load=C:\WINDOWS\inf\Other.exe
F3 - REG:win.ini: run=C:\WINDOWS\system32\config\Win.exe
O4 - HKLM\..\Run: [SmartAudio] C:\Program Files\CONEXANT\SmartAudio\SmartAudio.exe -c
O4 - HKLM\..\Run: [HP Software Update] C:\Program Files\HP\HP Software Update\HPWuSchd2.exe
O4 - HKCU\..\Run: [kava] C:\WINDOWS\system32\kavo.exe
O4 - HKCU\..\Run: [MSMSGS] "C:\Program Files\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [cdoosoft] C:\WINDOWS\system32\olhrwef.exe
O4 - HKCU\..\Run: [dc2k5] C:\WINDOWS\SVIQ.EXE
O4 - HKCU\..\Run: [Fun] C:\WINDOWS\system\Fun.exe
O4 - HKCU\..\Run: [dc] C:\WINDOWS\dc.exe
O4 - HKCU\..\Run: [Messenger (Yahoo!)] "C:\PROGRA~1\Yahoo!\Messenger\YahooMessenger.exe" -quiet
O4 - HKLM\..\Policies\Explorer\Run: [status] present
O4 - HKLM\..\Policies\Explorer\Run: [winlogon] C:\heap41a\svchost.exe C:\heap41a\std.txt
O4 - HKUS\S-1-5-19\..\RunOnce: [nlsf] cmd.exe /C move /Y "%SystemRoot%\System32\syssetub.dll" "%SystemRoot%\System32\syssetup.dll" (User 'LOCAL SERVICE')
O4 - HKUS\S-1-5-19\..\RunOnce: [tscuninstall] %systemroot%\system32\tscupgrd.exe (User 'LOCAL SERVICE')
O4 - HKUS\S-1-5-20\..\RunOnce: [nlsf] cmd.exe /C move /Y "%SystemRoot%\System32\syssetub.dll" "%SystemRoot%\System32\syssetup.dll" (User 'NETWORK SERVICE')
O4 - HKUS\S-1-5-18\..\RunOnce: [nlsf] cmd.exe /C move /Y "%SystemRoot%\System32\syssetub.dll" "%SystemRoot%\System32\syssetup.dll" (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\RunOnce: [nlsf] cmd.exe /C move /Y "%SystemRoot%\System32\syssetub.dll" "%SystemRoot%\System32\syssetup.dll" (User 'Default user')
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\MICROS~1\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~1\OFFICE11\REFIEBAR.DLL
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: {78AF2F24-A9C3-11D3-BF8C-0060B0FCC122} (AcDcToday Control) - file://C:\Program Files\AutoCAD Architectural 2\AcDcToday.ocx
O16 - DPF: {C6637286-300D-11D4-AE0A-0010830243BD} (InstaFred Control) - file://C:\Program Files\AutoCAD Architectural 2\InstFred.ocx
O16 - DPF: {F281A59C-7B65-11D3-8617-0010830243BD} (AcPreview Control) - file://C:\Program Files\AutoCAD Architectural 2\AcPreview.ocx
O17 - HKLM\System\CCS\Services\Tcpip\..\{B0703D27-26A6-40AC-B218-9B3B9326E6D1}: NameServer = 202.56.250.5 202.56.230.5
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\system32\HPZipm12.exe
O23 - Service: ServiceLayer - Nokia. - C:\Program Files\Nokia\PC Connectivity Solution\ServiceLayer.exe

--
End of file - 4090 bytes

Your system is severly infected. Problem with these infections nowadays is, it causes a lot of damage. Even if we clean the malware off your system, I can't guarantee that your system will be clean afterwards, because these infections/bundles leave a lot of leftovers behind that most scanners won't even recognise and logs won't show.
Also, I can't promise you we can repair all the damage it caused... Even after cleaning the malware, you can still get errors afterwards because of the damage. Solving these is not always possible since it will be searching for a needle in a haystack to find the right cause and solution.
So, we can try to clean this up and do what we can, but keep in mind that we can't solve ALL problems this malware already caused.

In light of this it would be wise for you to back up any files and folders that you don't want to lose before we start. Reason I am telling this is because when a system is so terribly infected and we try to clean this up manually, the damage that is already present may interfere with our removal attempts.

Actually, this doesn't suprise me at all...
I notice that you never scanned with an Antivirus previously before starting this thread - because you don't even have an Antivirus installed!
This is somewhat suicidal in today's digital world.
That's why I want you to install one first!!

* Please install Avira Antivirus: http://www.free-av.com/
This is a free Antivirus.

Perform a full scan with Avira and let it delete everything it is finding.
Then reboot.
After reboot, open your Avira and select "reports".
There doubleclick the report from the Full scan you have done. Click the "Report File" button and copy and paste this report in your next reply.
Then we'll start from there, because it really makes no sense otherwise that we clean this up manually if an Antivirusscan is not present which should be able to deal with most and prevent further reinfection.