Avast pisze po angielsku że jego pliki zostały zmodyfikowane i że włączenie ich może być niebezpieczne.
Zainstalowałem Kasperskiego i w wielu plikach które mam na dysku pokazuje wirus: Virus.Win32.Virut.q 
Czy konieczny będzie format? Niżej log z HijackList
Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 22:22:55, on 2008-01-07
Platform: Windows XP Dodatek SP2 (WinNT 5.01.2600)
MSIE: Unable to get Internet Explorer version!
Boot mode: Normal
Running processes:
H:\WINDOWS\System32\smss.exe
H:\WINDOWS\system32\winlogon.exe
H:\WINDOWS\system32\services.exe
H:\WINDOWS\system32\lsass.exe
H:\WINDOWS\system32\svchost.exe
H:\WINDOWS\System32\svchost.exe
E:\Avast4\aswUpdSv.exe
H:\WINDOWS\system32\spoolsv.exe
H:\WINDOWS\system32\cisvc.exe
H:\WINDOWS\system32\nvsvc32.exe
E:\Alcohol 120\StarWind\StarWindServiceAE.exe
H:\WINDOWS\system32\wuauclt.exe
H:\WINDOWS\system32\userinit.exe
H:\WINDOWS\Explorer.EXE
H:\WINDOWS\system32\wscntfy.exe
H:\Program Files\VIAudioi\SBADeck\ADeck.exe
E:\FlashGet\FlashGet.exe
E:\Avast4\ashDisp.exe
H:\WINDOWS\system32\ctfmon.exe
H:\Program Files\Winamp Remote\bin\OrbTray.exe
E:\DAEMON Tools Lite\daemon.exe
E:\Hamachi\hamachi.exe
E:\Open Office\program\soffice.exe
E:\Open Office\program\soffice.BIN
E:\Mozilla Firefox\firefox.exe
E:\HijackThis\HijackThis.exe
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Łącza
O2 - BHO: flashget urlcatch - {2F364306-AA45-47B5-9F9D-39A8B94E7EF7} - E:\FlashGet\jccatch.dll
O2 - BHO: FlashGet GetFlash Class - {F156768E-81EF-470C-9057-481BA8380DBA} - E:\FlashGet\getflash.dll
O4 - HKLM\..\Run: [zzGBK] C:\Gigabyte\Setup.exe
O4 - HKLM\..\Run: [AudioDeck] H:\Program Files\VIAudioi\SBADeck\ADeck.exe 1
O4 - HKLM\..\Run: [Flashget] E:\FlashGet\FlashGet.exe /min
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE H:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE H:\WINDOWS\system32\NvMcTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [NeroFilterCheck] H:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [avast!] E:\Avast4\ashDisp.exe
O4 - HKCU\..\Run: [CTFMON.EXE] H:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [Gadu-Gadu] "L:\Program Files\Gadu-Gadu\gg.exe" /tray
O4 - HKCU\..\Run: [Orb] "H:\Program Files\Winamp Remote\bin\OrbTray.exe" /background
O4 - HKCU\..\Run: [DAEMON Tools Lite] "E:\DAEMON Tools Lite\daemon.exe"
O4 - HKCU\..\Run: [AlcoholAutomount] "E:\Alcohol 120\axcmd.exe" /automount
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] H:\WINDOWS\system32\CTFMON.EXE (User 'USŁUGA LOKALNA')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] H:\WINDOWS\system32\CTFMON.EXE (User 'USŁUGA SIECIOWA')
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] H:\WINDOWS\system32\CTFMON.EXE (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] H:\WINDOWS\system32\CTFMON.EXE (User 'Default user')
O4 - Startup: hamachi.lnk = E:\Hamachi\hamachi.exe
O4 - Startup: OpenOffice.org 2.2.lnk = E:\Open Office\program\quickstart.exe
O4 - Global Startup: Microsoft Office.lnk = E:\Program Files\Microsoft Office\Office\OSA9.EXE
O8 - Extra context menu item: Download All with FlashGet - E:\FlashGet\jc_all.htm
O8 - Extra context menu item: Download with FlashGet - E:\FlashGet\jc_link.htm
O9 - Extra button: FlashGet - {D6E814A0-E0C5-11d4-8D29-0050BA6940E3} - E:\FlashGet\FlashGet.exe
O9 - Extra 'Tools' menuitem: FlashGet - {D6E814A0-E0C5-11d4-8D29-0050BA6940E3} - E:\FlashGet\FlashGet.exe
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - H:\Program Files\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - H:\Program Files\Messenger\msmsgs.exe
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - ALWIL Software - E:\Avast4\aswUpdSv.exe
O23 - Service: avast! Antivirus - ALWIL Software - E:\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - ALWIL Software - E:\Avast4\ashMaiSv.exe
O23 - Service: avast! Web Scanner - ALWIL Software - E:\Avast4\ashWebSv.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - H:\WINDOWS\system32\nvsvc32.exe
O23 - Service: StarWind AE Service (StarWindServiceAE) - Rocket Division Software - E:\Alcohol 120\StarWind\StarWindServiceAE.exe
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End of file - 4066 bytes