Ricordo che AVAST rivela ma non riesce a distruggere i seguenti trojan che puntualmente vanno ad infettare files di sistema (credo) Win32 :
SMALL-CAK - AGENT-GEN
All'inizio del log vedo dei files system32 non è che questi sono da eliminare ?
comunque sia posto il LOG ringraziando anticipatamente

Logfile of HijackThis v1.99.1
Scan saved at 23.07.07, on 11/01/2007
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:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\Programmi\Alwil Software\Avast4\aswUpdSv.exe
C:\Programmi\Alwil Software\Avast4\ashServ.exe
C:\Programmi\File comuni\EPSON\EBAPI\SAgent2.exe
C:\WINDOWS\system32\slserv.exe
C:\WINDOWS\System32\svchost.exe
C:\Programmi\Alwil Software\Avast4\ashMaiSv.exe
C:\Programmi\Alwil Software\Avast4\ashWebSv.exe
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\Programmi\File comuni\PCSuite\DataLayer\DataLayer.exe
C:\Documents and Settings\Giuseppe\Menu Avvio\Programmi\Nokia PC Suite 6\LaunchApplication.exe
C:\Documents and Settings\Giuseppe\Menu Avvio\Programmi\programmi vari\Winamp\winampa.exe
C:\Programmi\QuickTime\qttask.exe
C:\WINDOWS\system32\ctfmon.exe
C:\PROGRA~1\Yahoo!\MESSEN~1\YAHOOM~1.EXE
C:\Documents and Settings\Giuseppe\Menu Avvio\Programmi\Nokia PC Suite 6\PcSync2.exe
C:\Programmi\MSN Messenger\msnmsgr.exe
C:\Programmi\Google\GoogleToolbarNotifier\1.2.908.5008\GoogleToolbarNotifier.exe
C:\Documents and Settings\Giuseppe\Menu Avvio\Programmi\C6 Messenger\c6Messenger.exe
C:\WINDOWS\System32\spool\DRIVERS\W32X86\3\E_S10IC2.EXE
C:\PROGRA~1\FILECO~1\Nokia\MPAPI\MPAPI3s.exe
C:\PROGRA~1\FILECO~1\PCSuite\Services\SERVIC~1.EXE
C:\WINDOWS\system32\wscntfy.exe
C:\WINDOWS\system32\svchost.exe
C:\Programmi\Internet Explorer\iexplore.exe
C:\Programmi\Microsoft Office\Office\WINWORD.EXE
C:\Programmi\Adobe\Acrobat 5.0\Reader\AcroRd32.exe
C:\Programmi\Internet Explorer\iexplore.exe
C:\Programmi\Microsoft Office\Office\EXCEL.EXE
C:\WINDOWS\msagent\AgentSvr.exe
C:\WINDOWS\System32\msiexec.exe
C:\DOCUME~1\Giuseppe\IMPOST~1\Temp\Directory temporanea 3 per hijackthis.zip\HijackThis.exe
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.alice.it/oggi/index.html?free
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://it.yahoo.com
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://it.rd.yahoo.com/customize/ie/def ... .yahoo.com
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://it.yahoo.com
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
R3 - URLSearchHook: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - (no file)
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programmi\Adobe\Acrobat 5.0\Reader\ActiveX\AcroIEHelper.ocx
O2 - BHO: Windows Live Sign-in Helper - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Programmi\File comuni\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\programmi\google\googletoolbar2.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\programmi\google\googletoolbar2.dll
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [DataLayer] C:\Programmi\File comuni\PCSuite\DataLayer\DataLayer.exe
O4 - HKLM\..\Run: [PCSuiteTrayApplication] C:\Documents and Settings\Giuseppe\Menu Avvio\Programmi\Nokia PC Suite 6\LaunchApplication.exe -onlytray
O4 - HKLM\..\Run: [PinnacleDriverCheck] C:\WINDOWS\system32\PSDrvCheck.exe -CheckReg
O4 - HKLM\..\Run: [PMCS] "C:\Programmi\Pinnacle\Shared Files\Programs\MediaCenterService\PMC.Service.Main.exe" -host -clearDebug
O4 - HKLM\..\Run: [WinampAgent] C:\Documents and Settings\Giuseppe\Menu Avvio\Programmi\programmi vari\Winamp\winampa.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Programmi\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [Yahoo! Pager] "C:\PROGRA~1\Yahoo!\MESSEN~1\YAHOOM~1.EXE" -quiet
O4 - HKCU\..\Run: [PcSync] C:\Documents and Settings\Giuseppe\Menu Avvio\Programmi\Nokia PC Suite 6\PcSync2.exe /NoDialog
O4 - HKCU\..\Run: [msnmsgr] "C:\Programmi\MSN Messenger\msnmsgr.exe" /background
O4 - HKCU\..\Run: [swg] C:\Programmi\Google\GoogleToolbarNotifier\1.2.908.5008\GoogleToolbarNotifier.exe
O4 - Startup: C6 Messenger.lnk = C:\Documents and Settings\Giuseppe\Menu Avvio\Programmi\C6 Messenger\c6Messenger.exe
O4 - Global Startup: Adobe Gamma Loader.lnk = ?
O4 - Global Startup: EPSON Status Monitor 3 Environment Check 2.lnk = C:\WINDOWS\system32\spool\drivers\w32x86\3\E_SRCV02.EXE
O4 - Global Startup: Microsoft Office.lnk = C:\Programmi\Microsoft Office\Office\OSA9.EXE
O9 - Extra button: Messenger - {4528BBE0-4E08-11D5-AD55-00010333D0AD} - C:\PROGRA~1\Yahoo!\Common\yhexbmesit.dll
O9 - Extra 'Tools' menuitem: Yahoo! Messenger - {4528BBE0-4E08-11D5-AD55-00010333D0AD} - C:\PROGRA~1\Yahoo!\Common\yhexbmesit.dll
O9 - Extra button: (no name) - {85d1f590-48f4-11d9-9669-0800200c9a66} - %windir%\bdoscandel.exe (file missing)
O9 - Extra 'Tools' menuitem: Uninstall BitDefender Online Scanner v8 - {85d1f590-48f4-11d9-9669-0800200c9a66} - %windir%\bdoscandel.exe (file missing)
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: Yahoo! Chat - http://us.chat1.yimg.com/us.yimg.com/i/ ... 1/chat.cab
O16 - DPF: {30528230-99f7-4bb4-88d8-fa1d4f56a2ab} (YInstStarter Class) - C:\Programmi\Yahoo!\Common\yinsthelper.dll
O16 - DPF: {5D86DDB5-BDF9-441B-9E9E-D4730F4EE499} (BDSCANONLINE Control) - http://download.bitdefender.com/resourc ... oscan8.cab
O16 - DPF: {67DABFBF-D0AB-41FA-9C46-CC0F21721616} (DivXBrowserPlugin Object) - http://go.divx.com/plugin/DivXBrowserPlugin.cab
O16 - DPF: {B38870E4-7ECB-40DA-8C6A-595F0A5519FF} (MsnMessengerSetupDownloadControl Class) - http://messenger.msn.com/download/MsnMe ... loader.cab
O16 - DPF: {C1B7E532-3ECB-4E9E-BB3A-2951FFE67C61} (DownloaderActiveX Control) - http://c6.community.virgilio.it/downloa ... ctiveX.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{7767EA49-9864-4ABF-A1C7-8857579A731D}: NameServer = 192.168.1.1
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
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - Unknown owner - C:\Programmi\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: avast! Antivirus - Unknown owner - C:\Programmi\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - Unknown owner - C:\Programmi\Alwil Software\Avast4\ashMaiSv.exe" /service (file missing)
O23 - Service: avast! Web Scanner - Unknown owner - C:\Programmi\Alwil Software\Avast4\ashWebSv.exe" /service (file missing)
O23 - Service: EPSON Printer Status Agent2 (EPSONStatusAgent2) - SEIKO EPSON CORPORATION - C:\Programmi\File comuni\EPSON\EBAPI\SAgent2.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Programmi\File comuni\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: Sandra Data Service (SandraDataSrv) - SiSoftware - C:\Documents and Settings\Giuseppe\Menu Avvio\Programmi\programmi vari\SiSoftware Sandra Lite 2005.SR2a\RpcDataSrv.exe
O23 - Service: Sandra Service (SandraTheSrv) - SiSoftware - C:\Documents and Settings\Giuseppe\Menu Avvio\Programmi\programmi vari\SiSoftware Sandra Lite 2005.SR2a\RpcSandraSrv.exe
O23 - Service: SmartLinkService (SLService) - Smart Link - C:\WINDOWS\SYSTEM32\slserv.exe