Buongiorno a tutti voi e come ogni qual volta mi si presenta un problema al pc ricorro a voi esperti
E' da un pò che il pc mi va lentissimo specialmente durante l'avvio e stamattina ho provato a lanciare Malwarebytes ma a metà scansione, dopo che aveva iniziato a leggere 12 infezioni, il pc si è riavviato da solo. Posto subito il mio log magari ci sono problemi da risolvere alla base... Grazie in anticipo.

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 13.12.22, on 14/10/2011
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v8.00 (8.00.6001.18702)
Boot mode: Normal

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\services.exe
C:\WINDOWS\system32\savedump.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\Programmi\Alwil Software\Avast5\AvastSvc.exe
C:\WINDOWS\system32\spoolsv.exe
c:\programmi\file comuni\logitech\lvmvfm\LVPrcSrv.exe
C:\WINDOWS\System32\svchost.exe
C:\Programmi\File comuni\Apple\Mobile Device Support\AppleMobileDeviceService.exe
C:\WINDOWS\Explorer.EXE
C:\Programmi\IVT Corporation\BlueSoleil\BTNtService.exe
C:\WINDOWS\system32\LGScsiCommandService.exe
C:\Programmi\Google\Update\GoogleUpdate.exe
C:\Programmi\Malwarebytes' Anti-Malware\mbamservice.exe
C:\Programmi\File comuni\Microsoft Shared\VS7DEBUG\MDM.EXE
C:\WINDOWS\RTHDCPL.EXE
C:\Programmi\ATI Technologies\ATI.ACE\Core-Static\MOM.exe
C:\Documents and Settings\principale\Documenti\Alcohol 120\StarWind\StarWindServiceAE.exe
C:\Programmi\File comuni\Logitech\LComMgr\Communications_Helper.exe
C:\Programmi\Logitech\QuickCam10\QuickCam10.exe
C:\WINDOWS\system32\svchost.exe
C:\Programmi\File comuni\Logitech\LComMgr\LVComSX.exe
C:\Programmi\PowerISO\PWRISOVM.EXE
C:\Programmi\File comuni\Java\Java Update\jusched.exe
C:\Programmi\Adobe\Reader 9.0\Reader\Reader_sl.exe
C:\Programmi\Alwil Software\Avast5\avastUI.exe
C:\Programmi\Sony\Content Transfer\ContentTransferWMDetector.exe
C:\Programmi\iTunes\iTunesHelper.exe
C:\Programmi\Malwarebytes' Anti-Malware\mbamgui.exe
C:\Programmi\Logitech\Desktop Messenger\8876480\Program\LogitechDesktopMessenger.exe
C:\WINDOWS\system32\ctfmon.exe
C:\WINDOWS\system32\wuauclt.exe
C:\Programmi\DAEMON Tools Lite\DTLite.exe
C:\Programmi\Steam\Steam.exe
C:\Programmi\Messenger\msmsgs.exe
C:\Documents and Settings\principale\Impostazioni locali\Dati applicazioni\Facebook\Update\FacebookUpdate.exe
C:\Programmi\iPod\bin\iPodService.exe
C:\Programmi\Logitech\QuickCam10\COCIManager.exe
C:\Documents and Settings\principale\Desktop\HijackThis.exe
C:\Programmi\ATI Technologies\ATI.ACE\Core-Static\ccc.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://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://go.microsoft.com/fwlink/?LinkId=54896
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/?LinkId=69157
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Programmi\File comuni\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: (no name) - {5C255C8A-E604-49b4-9D64-90988571CECB} - (no file)
O2 - BHO: Guida per l'accesso a Windows Live - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Programmi\File comuni\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Programmi\Java\jre6\bin\jp2ssv.dll
O2 - BHO: EpsonToolBandKicker Class - {E99421FB-68DD-40F0-B4AC-B7027CAE2F1A} - C:\Programmi\EPSON\EPSON Web-To-Page\EPSON Web-To-Page.dll
O3 - Toolbar: EPSON Web-To-Page - {EE5D279F-081B-4404-994D-C6B60AAEBA6D} - C:\Programmi\EPSON\EPSON Web-To-Page\EPSON Web-To-Page.dll
O3 - Toolbar: (no name) - {c2d64ff7-0ab8-4263-89c9-ea3b0f8f050c} - (no file)
O4 - HKLM\..\Run: [RTHDCPL] RTHDCPL.EXE
O4 - HKLM\..\Run: [StartCCC] "C:\Programmi\ATI Technologies\ATI.ACE\Core-Static\CLIStart.exe" MSRun
O4 - HKLM\..\Run: [Logitech Hardware Abstraction Layer] KHALMNPR.EXE
O4 - HKLM\..\Run: [LogitechCommunicationsManager] "C:\Programmi\File comuni\Logitech\LComMgr\Communications_Helper.exe"
O4 - HKLM\..\Run: [LogitechQuickCamRibbon] "C:\Programmi\Logitech\QuickCam10\QuickCam10.exe" /hide
O4 - HKLM\..\Run: [LVCOMSX] "C:\Programmi\File comuni\Logitech\LComMgr\LVComSX.exe"
O4 - HKLM\..\Run: [PWRISOVM.EXE] C:\Programmi\PowerISO\PWRISOVM.EXE
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Programmi\File comuni\Java\Java Update\jusched.exe"
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Programmi\Adobe\Reader 9.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [Adobe ARM] "C:\Programmi\File comuni\Adobe\ARM\1.0\AdobeARM.exe"
O4 - HKLM\..\Run: [avast5] "C:\Programmi\Alwil Software\Avast5\avastUI.exe" /nogui
O4 - HKLM\..\Run: [QuickTime Task] "C:\Programmi\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [ContentTransferWMDetector.exe] C:\Programmi\Sony\Content Transfer\ContentTransferWMDetector.exe
O4 - HKLM\..\Run: [iTunesHelper] "C:\Programmi\iTunes\iTunesHelper.exe"
O4 - HKLM\..\Run: [Malwarebytes' Anti-Malware] "C:\Programmi\Malwarebytes' Anti-Malware\mbamgui.exe" /starttray
O4 - HKCU\..\Run: [LDM] C:\Programmi\Logitech\Desktop Messenger\8876480\Program\LogitechDesktopMessenger.exe
O4 - HKCU\..\Run: [AlcoholAutomount] "C:\Documents and Settings\principale\Documenti\Alcohol 120\axcmd.exe" /automount
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [DAEMON Tools Lite] "C:\Programmi\DAEMON Tools Lite\DTLite.exe" -autorun
O4 - HKCU\..\Run: [Steam] "C:\Programmi\Steam\Steam.exe" -silent
O4 - HKCU\..\Run: [MSMSGS] "C:\Programmi\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [Facebook Update] "C:\Documents and Settings\principale\Impostazioni locali\Dati applicazioni\Facebook\Update\FacebookUpdate.exe" /c /nocrashserver
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'Default user')
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O8 - Extra context menu item: Google Sidewiki... - res://C:\Programmi\Google\Google Toolbar\Component\GoogleToolbarDynamic_mui_en_96D6FF0C6D236BF8.dll/cmsidewiki.html
O9 - Extra button: Crea preferiti portatile - {2EAF5BB1-070F-11D3-9307-00C04FAE2D4F} - C:\Programmi\Microsoft ActiveSync\inetrepl.dll
O9 - Extra button: (no name) - {2EAF5BB2-070F-11D3-9307-00C04FAE2D4F} - C:\Programmi\Microsoft ActiveSync\inetrepl.dll
O9 - Extra 'Tools' menuitem: Crea preferiti portatile... - {2EAF5BB2-070F-11D3-9307-00C04FAE2D4F} - C:\Programmi\Microsoft ActiveSync\inetrepl.dll
O9 - Extra button: Ricerche - {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:\Programmi\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programmi\Messenger\msmsgs.exe
O16 - DPF: {5D6F45B3-9043-443D-A792-115447494D24} (UnoCtrl Class) - http://messenger.zone.msn.com/MessengerGamesContent/GameContent/it/uno1/GAME_UNO1.cab
O16 - DPF: {6E32070A-766D-4EE6-879C-DC1FA91D2FC3} (MUWebControl Class) - http://update.microsoft.com/microsoftupdate/v6/V5Controls/en/x86/client/muweb_site.cab?1244314161562
O16 - DPF: {C3F79A2B-B9B4-4A66-B012-3EE46475B072} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsPAClient.cab56907.cab
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://fpdownload2.macromedia.com/get/shockwave/cabs/flash/swflash.cab
O16 - DPF: {E2883E8F-472F-4FB0-9522-AC9BF37916A7} - http://platformdl.adobe.com/NOS/getPlusPlus/1.6/gp.cab
O16 - DPF: {F5A7706B-B9C0-4C89-A715-7A0C6B05DD48} (Minesweeper Flags Class) - http://messenger.zone.msn.com/binary/MineSweeper.cab56986.cab
O23 - Service: Apple Mobile Device - Apple Inc. - C:\Programmi\File comuni\Apple\Mobile Device Support\AppleMobileDeviceService.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 - AVAST Software - C:\Programmi\Alwil Software\Avast5\AvastSvc.exe
O23 - Service: BlueSoleil Hid Service - Unknown owner - C:\Programmi\IVT Corporation\BlueSoleil\BTNtService.exe
O23 - Service: Servizio di Google Update (gupdate) (gupdate) - Google Inc. - C:\Programmi\Google\Update\GoogleUpdate.exe
O23 - Service: Servizio Google Update (gupdatem) (gupdatem) - Google Inc. - C:\Programmi\Google\Update\GoogleUpdate.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Programmi\File comuni\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: Servizio iPod (iPod Service) - Apple Inc. - C:\Programmi\iPod\bin\iPodService.exe
O23 - Service: LG SCSI command service (LGScsiCommandService) - Mobile Leader Co.,Ltd. - C:\WINDOWS\system32\LGScsiCommandService.exe
O23 - Service: Logitech Process Monitor (LVPrcSrv) - Logitech Inc. - c:\programmi\file comuni\logitech\lvmvfm\LVPrcSrv.exe
O23 - Service: LVSrvLauncher - Logitech Inc. - C:\Programmi\File comuni\Logitech\SrvLnch\SrvLnch.exe
O23 - Service: MBAMService - Malwarebytes Corporation - C:\Programmi\Malwarebytes' Anti-Malware\mbamservice.exe
O23 - Service: nProtect GameGuard Service (npggsvc) - Unknown owner - C:\WINDOWS\system32\GameMon.des.exe (file missing)
O23 - Service: Remote Packet Capture Protocol v.0 (experimental) (rpcapd) - CACE Technologies, Inc. - C:\Programmi\WinPcap\rpcapd.exe
O23 - Service: PC Tools Auxiliary Service (sdAuxService) - PC Tools - C:\Programmi\Spyware Doctor\pctsAuxs.exe
O23 - Service: PC Tools Security Service (sdCoreService) - PC Tools - C:\Programmi\Spyware Doctor\pctsSvc.exe
O23 - Service: StarWind AE Service (StarWindServiceAE) - Rocket Division Software - C:\Documents and Settings\principale\Documenti\Alcohol 120\StarWind\StarWindServiceAE.exe

--
End of file - 10438 bytes

Avvia hijackthis, metti la spunta alle voci che andrò ad elencarti e con tutte le applicazioni chiuse e disconnesso da Internet,premi su "fix checked":

C:\Documents and Settings\principale\Impostazioni locali\Dati applicazioni\Facebook\Update\FacebookUpdate.exe

O2 - BHO: (no name) - {5C255C8A-E604-49b4-9D64-90988571CECB} - (no file)

O3 - Toolbar: EPSON Web-To-Page - {EE5D279F-081B-4404-994D-C6B60AAEBA6D} - C:\Programmi\EPSON\EPSON Web-To-Page\EPSON Web-To-Page.dll

O3 - Toolbar: (no name) - {c2d64ff7-0ab8-4263-89c9-ea3b0f8f050c} - (no file)

O4 - HKCU\..\Run: [Facebook Update] "C:\Documents and Settings\principale\Impostazioni locali\Dati applicazioni\Facebook\Update\FacebookUpdate.exe" /c /nocrashserver

Questo programma lo usi, altrimenti rimuovilo:
C:\Programmi\Sony\Content Transfer\ContentTransferWMDetector.exe

Dovresti aggiornare Avast alla vs 6 QUI leggi la scheda. Alla fine fai una scansione completa vediamo cosa trova.
Vedo che hai Adobe Reader 9.0 è un programma molto pesante, ti consiglierei di rimuoverlo ed installarne uno
più leggero e veloce, QUESTO.
Prova a fare una scansione con Malwarebytes, prima lo devi aggiornare e poi fai una scansione COMPLETA non rapida, elimina quello che trova, se non riesci prova a farla in modalità provvisoria, poi posta il log.
Fai una pulizia con Ccleaner compreso il Registro.
Vain in C:\windows, cerca la cartella prefetch aprila e svuotala completamente.
Fai sapere come va. Ciao