Ciao a tutti, vi spiego il mio problema. Ho installato iobit360 security, non ho mai avuto problemi fino a ieri, quando dopo una scansione mi ha rilevato dei settaggi hijack sospetti che ho ingenuamente cancellato senza creare un punto di ripristino. Da allora il pc ha rallentato fino al punto che ha iniziato a bloccarsi ed ora funziona soltanto in modalità provvisoria. Da lì le ho provate un po' tutte ma niente da fare... All'avvio continua a bloccarsi ripetutamente. Ho fatto la scansione con l'antivirus, malwarebyte e hijackthis.. questo è il log che ho salvato..
Aspetto vostre notizie, vorrei evitare l'ennesima formattazione sinceramente....

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 16.22.05, on 08/10/2009
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16735)
Boot mode: Safe mode with network support

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\Trend Micro\HijackThis\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://search.speedbit.com
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 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = 127.0.0.1
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: AskBar BHO - {201f27d4-3704-41d6-89c1-aa35e39143ed} - C:\Programmi\AskBarDis\bar\bin\askBar.dll
O2 - BHO: Spybot-S&D IE Protection - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Programmi\Java\jre6\bin\jp2ssv.dll
O2 - BHO: JQSIEStartDetectorImpl - {E7E6F031-17CE-4C07-BC86-EABFE594F69C} - C:\Programmi\Java\jre6\lib\deploy\jqs\ie\jqs_plugin.dll
O2 - BHO: DAPIELoader Class - {FF6C3CF0-4B15-11D1-ABED-709549C10000} - C:\PROGRA~1\DAP\DAPIEL~1.DLL
O3 - Toolbar: Ask Toolbar - {3041d03e-fd4b-44e0-b742-2d9b88305f98} - C:\Programmi\AskBarDis\bar\bin\askBar.dll
O4 - HKLM\..\Run: [UnlockerAssistant] "C:\Programmi\Unlocker\UnlockerAssistant.exe" -H
O4 - HKLM\..\Run: [ATICCC] "C:\Programmi\ATI Technologies\ATI.ACE\cli.exe" runtime -Delay
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Programmi\Adobe\Reader 9.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Programmi\Java\jre6\bin\jusched.exe"
O4 - HKLM\..\Run: [CloneCDTray] "C:\Programmi\SlySoft\CloneCD\CloneCDTray.exe" /s
O4 - HKLM\..\Run: [AliceRE_McciTrayApp] C:\PROGRA~1\ALICET~1\vendors\AliceRE\content\template\DRIVEN~1\syncer\MCCITR~1.EXE
O4 - HKLM\..\Run: [Motive SmartBridge] C:\PROGRA~1\ALICET~1\SMARTB~1\MotiveSB.exe
O4 - HKLM\..\Run: [HP Software Update] "C:\Programmi\Hewlett-Packard\HP Software Update\HPWuSchd.exe"
O4 - HKLM\..\Run: [HPDJ Taskbar Utility] C:\WINDOWS\system32\spool\drivers\w32x86\3\hpztsb09.exe
O4 - HKLM\..\Run: [DeviceDiscovery] C:\Programmi\Hewlett-Packard\Digital Imaging\bin\hpotdd01.exe
O4 - HKLM\..\Run: [COMODO Internet Security] "C:\Programmi\COMODO\COMODO Internet Security\cfp.exe" -h
O4 - HKLM\..\Run: [Malwarebytes Anti-Malware (reboot)] "C:\Programmi\Malwarebytes' Anti-Malware\mbam.exe" /runcleanupscript
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [TaskSwitchXP] C:\Programmi\TaskSwitchXP\TaskSwitchXP.exe
O4 - HKCU\..\Run: [Sidebar] C:\Programmi\Windows Sidebar\sidebar.exe /autoRun
O4 - HKCU\..\Run: [DownloadAccelerator] "C:\Programmi\DAP\DAP.EXE" /STARTUP
O4 - HKCU\..\Run: [AlcoholAutomount] "C:\Programmi\Alcohol Soft\Alcohol 52\axcmd.exe" /automount
O4 - HKCU\..\Run: [Advanced SystemCare 3] "C:\Programmi\IObit\Advanced SystemCare 3\AWC.exe" /startup
O4 - HKCU\..\Run: [SpybotSD TeaTimer] C:\Programmi\Spybot - Search & Destroy\TeaTimer.exe
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVIZIO LOCALE')
O4 - HKUS\S-1-5-19\..\Run: [TaskSwitchXP] C:\Programmi\TaskSwitchXP\TaskSwitchXP.exe (User 'SERVIZIO LOCALE')
O4 - HKUS\S-1-5-19\..\RunOnce: [_nltide_2] regsvr32 /s /n /i:U shell32 (User 'SERVIZIO LOCALE')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVIZIO DI RETE')
O4 - HKUS\S-1-5-20\..\RunOnce: [_nltide_2] regsvr32 /s /n /i:U shell32 (User 'SERVIZIO DI RETE')
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SYSTEM')
O4 - HKUS\S-1-5-18\..\RunOnce: [_nltide_2] regsvr32 /s /n /i:U shell32 (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'Default user')
O4 - HKUS\.DEFAULT\..\RunOnce: [_nltide_2] regsvr32 /s /n /i:U shell32 (User 'Default user')
O4 - S-1-5-18 Startup: CubeDesktop.exe.lnk = C:\Documents and Settings\All Users\Menu Avvio\Programmi\Cube Desktop\CubeDesktop.exe (User 'SYSTEM')
O4 - S-1-5-18 Startup: ERUNT AutoBackup.lnk = C:\Programmi\ERUNT\AUTOBACK.EXE (User 'SYSTEM')
O4 - S-1-5-18 Startup: OpenOffice.org 3.1.lnk = C:\Programmi\OpenOffice.org 3\program\quickstart.exe (User 'SYSTEM')
O4 - S-1-5-18 Startup: winroll.exe.lnk = C:\Documents and Settings\All Users\Menu Avvio\Programmi\Winroll\winroll.exe (User 'SYSTEM')
O4 - .DEFAULT Startup: CubeDesktop.exe.lnk = C:\Documents and Settings\All Users\Menu Avvio\Programmi\Cube Desktop\CubeDesktop.exe (User 'Default user')
O4 - .DEFAULT Startup: ERUNT AutoBackup.lnk = C:\Programmi\ERUNT\AUTOBACK.EXE (User 'Default user')
O4 - .DEFAULT Startup: OpenOffice.org 3.1.lnk = C:\Programmi\OpenOffice.org 3\program\quickstart.exe (User 'Default user')
O4 - .DEFAULT Startup: winroll.exe.lnk = C:\Documents and Settings\All Users\Menu Avvio\Programmi\Winroll\winroll.exe (User 'Default user')
O4 - .DEFAULT User Startup: CubeDesktop.exe.lnk = C:\Documents and Settings\All Users\Menu Avvio\Programmi\Cube Desktop\CubeDesktop.exe (User 'Default user')
O4 - .DEFAULT User Startup: winroll.exe.lnk = C:\Documents and Settings\All Users\Menu Avvio\Programmi\Winroll\winroll.exe (User 'Default user')
O4 - Startup: CubeDesktop.exe.lnk = C:\Documents and Settings\All Users\Menu Avvio\Programmi\Cube Desktop\CubeDesktop.exe
O4 - Startup: ERUNT AutoBackup.lnk = C:\Programmi\ERUNT\AUTOBACK.EXE
O4 - Startup: OpenOffice.org 3.1.lnk = C:\Programmi\OpenOffice.org 3\program\quickstart.exe
O4 - Startup: winroll.exe.lnk = C:\Documents and Settings\All Users\Menu Avvio\Programmi\Winroll\winroll.exe
O4 - Global Startup: Alice ti aiuta.lnk = C:\Programmi\Alice ti aiuta\bin\matcli.exe
O4 - Global Startup: Windows Search.lnk = C:\Programmi\Windows Desktop Search\WindowsSearch.exe
O8 - Extra context menu item: &Clean Traces - C:\Programmi\DAP\Privacy Package\dapcleanerie.htm
O8 - Extra context menu item: &Download with &DAP - C:\Programmi\DAP\dapextie.htm
O8 - Extra context menu item: Download &all with DAP - C:\Programmi\DAP\dapextie2.htm
O9 - Extra button: (no name) - {85d1f590-48f4-11d9-9669-0800200c9a66} - C:\WINDOWS\bdoscandel.exe
O9 - Extra 'Tools' menuitem: Uninstall BitDefender Online Scanner - {85d1f590-48f4-11d9-9669-0800200c9a66} - C:\WINDOWS\bdoscandel.exe
O9 - Extra button: (no name) - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O9 - Extra 'Tools' menuitem: Spybot - Search & Destroy Configuration - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\PROGRA~1\SPYBOT~1\SDHelper.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
O16 - DPF: {5D86DDB5-BDF9-441B-9E9E-D4730F4EE499} (BDSCANONLINE Control) - http://download.bitdefender.com/resources/scanner/sources/en/scan8/oscan8.cab
O20 - AppInit_DLLs: prio.dll C:\WINDOWS\system32\guard32.dll
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: COMODO Internet Security Helper Service (cmdAgent) - COMODO - C:\Programmi\COMODO\COMODO Internet Security\cmdagent.exe
O23 - Service: ComodoBackupService - COMODO - C:\Programmi\COMODO\BackUp\CmdBkSvc.exe
O23 - Service: Servizio di Google Update (gupdate) (gupdate) - Google Inc. - C:\Programmi\Google\Update\GoogleUpdate.exe
O23 - Service: Java Quick Starter (JavaQuickStarterService) - Sun Microsystems, Inc. - C:\Programmi\Java\jre6\bin\jqs.exe
O23 - Service: Network WanMiniport First Position - Unknown owner - C:\Programmi\Telecom Italia\WanMiniport1st\srvany.exe
O23 - Service: NMSAccessU - Unknown owner - C:\Programmi\CDBurnerXP\NMSAccessU.exe
O23 - Service: Private Folder Service (prfldsvc) - Unknown owner - C:\WINDOWS\system32\PrfldSvc.exe
O23 - Service: StarWind AE Service (StarWindServiceAE) - Rocket Division Software - C:\Programmi\Alcohol Soft\Alcohol 52\StarWind\StarWindServiceAE.exe

--
End of file - 9303 bytes

Grazie anticipatamente

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://search.speedbit.com

questa voce potrebbe essere un malware, prova a scansionarla su www.virustotal.com

O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file) DA FIXARE

Hai provato a fare un ripristino di configurazione per i problemi a cui accenni nel post?