Esegui 
all'avvio del pc avast mi segnala sempre la presenza di un CAVALLO DI TROIA:
in C:\data.exe[upx]
ed è un win32.horst-l [trj]
seguendo i consigli di avast (cancella o sposta nel cestino) mi torna comunque fuori la volta successiva che riaccendo il pc.
io ho avast come antivirus e sygate come firewall.
a dire la verita il virus ce l'ho da più di un mese e non mi ha mai dato noia, però non credo sia la cosa migliore lasciarlo li.
questo è il mio log di hijack
Logfile of HijackThis v1.98.2
Scan saved at 10.36.55, on 17/01/2007
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)
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:\Programmi\Sygate\SPF\smc.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\AGRSMMSG.exe
C:\WINDOWS\SOUNDMAN.EXE
C:\WINDOWS\vsnpstd2.exe
C:\Programmi\Java\jre1.5.0_04\bin\jusched.exe
C:\Programmi\File comuni\Real\Update_OB\realsched.exe
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\WINDOWS\system32\ctfmon.exe
C:\PROGRA~1\MSNMES~1\DEVICE~1\msgrdvmn.exe
C:\Programmi\Alwil Software\Avast4\aswUpdSv.exe
C:\Programmi\Alwil Software\Avast4\ashServ.exe
C:\Programmi\File comuni\EPSON\EBAPI\SAgent2.exe
C:\Programmi\File comuni\LightScribe\LSSrvc.exe
C:\WINDOWS\System32\nvsvc32.exe
C:\WINDOWS\system32\IoctlSvc.exe
C:\WINDOWS\System32\svchost.exe
C:\Programmi\Alwil Software\Avast4\ashMaiSv.exe
C:\Programmi\Alwil Software\Avast4\ashWebSv.exe
C:\Programmi\Mozilla Firefox\firefox.exe
C:\Documents and Settings\Mario Luca\Desktop\hijack\HijackThis.exe
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.it/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://GLOBAL.ACER.COM/
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programmi\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O4 - HKLM\..\Run: [AGRSMMSG] AGRSMMSG.exe
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\System32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\System32\NvMcTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [SoundMan] SOUNDMAN.EXE
O4 - HKLM\..\Run: [SNPSTD2] C:\WINDOWS\vsnpstd2.exe
O4 - HKLM\..\Run: [gaSrve] C:\WINDOWS\gaSrve.exe
O4 - HKLM\..\Run: [resagnt] C:\WINDOWS\restun.exe
O4 - HKLM\..\Run: [FCbVLramex.exe] C:\WINDOWS\FCbVLramex.exe
O4 - HKLM\..\Run: [PaOtDgaSrve.exe] C:\WINDOWS\PaOtDgaSrve.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Programmi\Java\jre1.5.0_04\bin\jusched.exe
O4 - HKLM\..\Run: [SmcService] C:\PROGRA~1\Sygate\SPF\smc.exe -startgui
O4 - HKLM\..\Run: [TkBellExe] "C:\Programmi\File comuni\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Programmi\QuickTime\qttask.exe" -atboottime
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [WindowsLivePhone] "C:\PROGRA~1\MSNMES~1\DEVICE~1\msgrdvmn.exe" /AutoRun
O4 - Global Startup: EPSON Status Monitor 3 Environment Check(2).lnk = C:\WINDOWS\system32\spool\drivers\w32x86\3\E_SRCV02.EXE
O4 - Global Startup: Adobe Reader Speed Launch.lnk = C:\Programmi\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.5.0_04\bin\npjpi150_04.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.5.0_04\bin\npjpi150_04.dll
O9 - Extra button: Ricerche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O9 - Extra button: AIM - {AC9E2541-2814-11d5-BC6D-00B0D0A1DE45} - C:\Programmi\AIM\aim.exe
O14 - IERESET.INF: START_PAGE_URL=http://GLOBAL.ACER.COM/
O18 - Protocol: livecall - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\MSNMES~1\MSGRAP~1.DLL
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\MSNMES~1\MSGRAP~1.DLL
grazie a chi mi risponderà, è la prima volta che uso il forum spero di aver posto il mio argomento nel posto giusto.
