Virus that auto restart itself when windows loding page

[teapot]

i got this problem the 2nd time, at first i thought there is something problem with my hardware, but i know nothing about computer, so i take it to the pc shop and ask them to repair it, then they install back windows in my pc after backup my data and the problem solve, then in only 1 day after i got back my pc the same problem occurs to me. I dont know if its virus or what, but the difference is, at 1st infection I even cant log in to safe mode( it restart itself after i click "safe mode"), but in this 2nd problem i can log in in safe mode, but still cant log in Windows normally.

I also try scan my computer in safe mode with NORMANfix 2009, avast and Malwarebytes' Anti-Malware, but they find no infected virus in my pc, but when i try to install SUPERAntiSpyware, there is a pop up say "The system administrator has set policies to prevent this installation."

please help me!~~ and if u need the Hijack this log, this is it, thanks:

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 6:38:05 PM, on 3/4/2009
Platform: Windows XP SP3, v.3264 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP3 (6.00.2900.3264)
Boot mode: Safe mode with network support

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\Explorer.EXE
C:\Program Files\Common Files\Ahead\Lib\NMIndexStoreSvr.exe
C:\Program Files\Alwil Software\Avast4\ashSimpl.exe
C:\Program Files\Microsoft Office\OFFICE11\WINWORD.EXE
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page =
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
R3 - Default URLSearchHook is missing
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
O4 - HKLM\..\Run: [Smapp] C:\Program Files\Analog Devices\SoundMAX\SMTray.exe
O4 - HKLM\..\Run: [StartCCC] "C:\Program Files\ATI Technologies\ATI.ACE\Core-Static\CLIStart.exe"
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 8.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [NeroFilterCheck] C:\Program Files\Common Files\Ahead\Lib\NeroCheck.exe
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\RunOnce: [Malwarebytes' Anti-Malware] C:\Program Files\Malwarebytes' Anti-Malware\mbamgui.exe /install /silent
O4 - HKCU\..\RunOnce: [NeroHomeFirstStart] C:\Program Files\Common Files\Ahead\Lib\NMFirstStart.exe
O4 - Global Startup: WinZip Quick Pick.lnk = C:\Program Files\WinZip\WZQKPICK.EXE
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\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
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - ALWIL Software - C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: Ati HotKey Poller - ATI Technologies Inc. - C:\WINDOWS\system32\Ati2evxx.exe
O23 - Service: ATI Smart - Unknown owner - C:\WINDOWS\system32\ati2sgag.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: NBService - Nero AG - C:\Program Files\Nero\Nero 7\Nero BackItUp\NBService.exe
O23 - Service: NMIndexingService - Nero AG - C:\Program Files\Common Files\Ahead\Lib\NMIndexingService.exe
O23 - Service: SoundMAX Agent Service (SoundMAX Agent Service (default)) - Analog Devices, Inc. - C:\Program Files\Analog Devices\SoundMAX\SMAgent.exe

--
End of file - 3505 bytes

[heart reaper]

First of all, try to explain your problem, then try to explain what you did after that.

As far as i understand your problem, I give this suggestion..

boot into safe mode, in the start menu, chk if there is anything in the startup folder. If yes, then post here what there is.

and for betterment of your system, it is recommended to use only one antivirus and security program. too many can instead get you more trouble than the virus itself.

other wise your log is clean to me.