salve, volendo fare un po' di pulizia, ho usato CCleaner, dopo aver eliminato la spazzatura, dal menu start esegui con mia sorpresa mi sono ritrovato l'autocompletamento degli indirizzi, andando sul registro per la verifica digitando CURRENT-USER/SOFTWERE/MICROSOFT mi accorgo della sparizione della cartella explorer ed al suo posto altra cartella con la sigla "EXPLORRER" con all'interno una serie di stringhe a me sconosciute, proseguendo l'analisi mi sono ritrovato altre cartelle siglate "LINDOW" ed un altra con "LINDOWS" che caspita di virus si tratta? e che genere di modifiche mi ha creato?
grazie fin da adesso
allego log non si sa mai che serva

Logfile of HijackThis v1.99.1
Scan saved at 18.45.02, on 13/10/2005
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:\WINDOWS\Explorer.EXE
C:\Programmi\File comuni\Symantec Shared\ccProxy.exe
C:\Programmi\File comuni\Symantec Shared\ccSetMgr.exe
C:\Programmi\Norton Internet Security\ISSVC.exe
C:\Programmi\File comuni\Symantec Shared\SNDSrvc.exe
C:\Programmi\File comuni\Symantec Shared\SPBBC\SPBBCSvc.exe
C:\Programmi\File comuni\Symantec Shared\ccEvtMgr.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Programmi\Norton Internet Security\Norton AntiVirus\navapsvc.exe
C:\WINDOWS\System32\nvsvc32.exe
C:\WINDOWS\system32\svchost.exe
C:\Programmi\File comuni\Symantec Shared\CCPD-LC\symlcsvc.exe
C:\Programmi\HP\Digital Imaging\Unload\hpqcmon.exe
C:\WINDOWS\System32\hphmon05.exe
C:\Programmi\Multimedia Card Reader\shwicon2k.exe
C:\Programmi\File comuni\Microsoft Shared\Works Shared\WkUFind.exe
C:\WINDOWS\System32\spool\drivers\w32x86\3\hpztsb08.exe
C:\Programmi\Java\jre1.5.0_04\bin\jusched.exe
C:\Program Files\GlobespanVirata\Adsl\dslstat.exe
C:\Program Files\GlobespanVirata\Adsl\dslagent.exe
C:\windows\system\hpsysdrv.exe
C:\Programmi\File comuni\Symantec Shared\ccApp.exe
C:\PROGRA~1\HPPAVI~1\Pavilion\XPHWWBP4\plugin\bin\PCHButton.exe
C:\WINDOWS\system32\rundll32.exe
C:\Programmi\BHODemon 2\BHODemon.exe
C:\Programmi\AnalogX\Proxy\proxy.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\wuauclt.exe
C:\Programmi\Internet Explorer\iexplore.exe
C:\Programmi\Messenger\msmsgs.exe
C:\Documents and Settings\Proprietario\Desktop\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.tuttogratis.it/
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programmi\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: Norton Internet Security - {9ECB9560-04F9-4bbc-943D-298DDF1699E1} - C:\Programmi\File comuni\Symantec Shared\AdBlocking\NISShExt.dll
O2 - BHO: NAV Helper - {BDF3E430-B101-42AD-A544-FADC6B084872} - C:\Programmi\Norton Internet Security\Norton AntiVirus\NavShExt.dll
O3 - Toolbar: Norton Internet Security - {0B53EAC3-8D69-4b9e-9B19-A37C9A5676A7} - C:\Programmi\File comuni\Symantec Shared\AdBlocking\NISShExt.dll
O3 - Toolbar: Norton AntiVirus - {42CDD1BF-3FFB-4238-8AD1-7859DF00B1D6} - C:\Programmi\Norton Internet Security\Norton AntiVirus\NavShExt.dll
O4 - HKLM\..\Run: [CamMonitor] c:\Programmi\HP\Digital Imaging\Unload\hpqcmon.exe
O4 - HKLM\..\Run: [HPHUPD05] c:\Programmi\HP\{45B6180B-DCAB-4093-8EE8-6164457517F0}\hphupd05.exe
O4 - HKLM\..\Run: [HPHmon05] C:\WINDOWS\System32\hphmon05.exe
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\System32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [Sunkist2k] C:\Programmi\Multimedia Card Reader\shwicon2k.exe
O4 - HKLM\..\Run: [Microsoft Works Update Detection] C:\Programmi\File comuni\Microsoft Shared\Works Shared\WkUFind.exe
O4 - HKLM\..\Run: [HPDJ Taskbar Utility] C:\WINDOWS\System32\spool\drivers\w32x86\3\hpztsb08.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Programmi\Java\jre1.5.0_04\bin\jusched.exe
O4 - HKLM\..\Run: [Symantec NetDriver Monitor] C:\PROGRA~1\SYMNET~1\SNDMon.exe /Consumer
O4 - HKLM\..\Run: [DSLSTATEXE] C:\Program Files\GlobespanVirata\Adsl\dslstat.exe icon
O4 - HKLM\..\Run: [DSLAGENTEXE] C:\Program Files\GlobespanVirata\Adsl\dslagent.exe
O4 - HKLM\..\Run: [hpsysdrv] c:\windows\system\hpsysdrv.exe
O4 - HKLM\..\Run: [HotKeysCmds] C:\WINDOWS\System32\hkcmd.exe
O4 - HKLM\..\Run: [ccApp] "C:\Programmi\File comuni\Symantec Shared\ccApp.exe"
O4 - HKCU\..\Run: [NVIEW] rundll32.exe nview.dll,nViewLoadHook
O4 - HKCU\..\Run: [Acme.PCHButton] C:\PROGRA~1\HPPAVI~1\Pavilion\XPHWWBP4\plugin\bin\PCHButton.exe
O4 - HKCU\..\Run: [BackupNotify] c:\Programmi\HP\Digital Imaging\bin\backupnotify.exe
O4 - Startup: BHODemon 2.0.lnk = C:\Programmi\BHODemon 2\BHODemon.exe
O4 - Startup: Proxy.lnk = C:\Programmi\AnalogX\Proxy\proxy.exe
O4 - Global Startup: Avvio veloce di Adobe Reader.lnk = C:\Programmi\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O4 - Global Startup: Microsoft Office.lnk = C:\Programmi\Microsoft Office\Office10\OSA.EXE
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: Copernic Agent - {688DC797-DC11-46A7-9F1B-445F4F58CE6E} - C:\Programmi\Copernic Agent\CopernicAgent.exe
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programmi\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programmi\Messenger\msmsgs.exe
O16 - DPF: {2BC66F54-93A8-11D3-BEB6-00105AA9B6AE} (Symantec AntiVirus scanner) - http://security.symantec.com/sscv6/SharedContent/vc/bin/AvSniff.cab
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsupdate/v6/V5Controls/en/x86/client/wuweb_site.cab?1123952809796
O16 - DPF: {644E432F-49D3-41A1-8DD5-E099162EEEC5} (Symantec RuFSI Utility Class) - http://security.symantec.com/sscv6/SharedContent/common/bin/cabsa.cab
O16 - DPF: {80DD2229-B8E4-4C77-B72F-F22972D723EA} (AvxScanOnline Control) - http://www.notrace.it/scan/Msie/bitdefender.cab
O16 - DPF: {9A9307A0-7DA4-4DAF-B042-5009F29E09E1} (ActiveScan Installer Class) - http://www.pandasoftware.com/activescan/as5free/asinst.cab
O16 - DPF: {EF791A6B-FC12-4C68-99EF-FB9E207A39E6} (McFreeScan Class) - http://download.mcafee.com/molbin/iss-loc/vso/en-us/tools/mcfscan/2,0,0,4576/mcfscan.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{49C38BE2-166B-4850-8E74-9D2EEEDA82A8}: NameServer = 213.205.32.70 213.205.36.70
O20 - Winlogon Notify: igfxcui - C:\WINDOWS\SYSTEM32\igfxsrvc.dll
O23 - Service: Symantec Event Manager (ccEvtMgr) - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\ccEvtMgr.exe
O23 - Service: Symantec Network Proxy (ccProxy) - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\ccProxy.exe
O23 - Service: Symantec Password Validation (ccPwdSvc) - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\ccPwdSvc.exe
O23 - Service: Symantec Settings Manager (ccSetMgr) - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\ccSetMgr.exe
O23 - Service: ISSvc (ISSVC) - Symantec Corporation - C:\Programmi\Norton Internet Security\ISSVC.exe
O23 - Service: Servizio Auto-Protect di Norton AntiVirus (navapsvc) - Symantec Corporation - C:\Programmi\Norton Internet Security\Norton AntiVirus\navapsvc.exe
O23 - Service: NVIDIA Driver Helper Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\System32\nvsvc32.exe
O23 - Service: SAVScan - Symantec Corporation - C:\Programmi\Norton Internet Security\Norton AntiVirus\SAVScan.exe
O23 - Service: ScriptBlocking Service (SBService) - Symantec Corporation - C:\PROGRA~1\FILECO~1\SYMANT~1\SCRIPT~1\SBServ.exe
O23 - Service: Symantec Network Drivers Service (SNDSrvc) - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\SNDSrvc.exe
O23 - Service: Symantec SPBBCSvc (SPBBCSvc) - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\SPBBC\SPBBCSvc.exe
O23 - Service: Symantec Core LC - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\CCPD-LC\symlcsvc.exe
O23 - Service: SymWMI Service (SymWSC) - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\Security Center\SymWSC.exe

grazie per le gentili risposte :-)