Salve ragazzi,
di punto in bianco il mio pc è entrato in crisi.
Mi si aprono a ripetizione pagine di Internet Explorer (che non utilizzo mai, poichè navigo con Firefox), alcune che mi segnalano l'errore 404, altre che mi aprono siti che non ho mai visto prima.
Vi sarei grato se poteste darmi qualche consiglio, vi posto anche il file di log ottenuto con Hijackthis:

Logfile of HijackThis v1.99.1
Scan saved at 16.17.35, on 20/08/2007
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\Ati2evxx.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\Explorer.EXE
C:\Programmi\Alwil Software\Avast4\aswUpdSv.exe
C:\Programmi\Alwil Software\Avast4\ashServ.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Programmi\ATI Technologies\ATI Control Panel\atiptaxx.exe
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\Programmi\Adobe\Photoshop Album Starter Edition\3.2\Apps\apdproxy.exe
C:\Programmi\Java\jre1.6.0_01\bin\jusched.exe
C:\Programmi\Ringz Studio\Storm Codec\qttask.exe
C:\WINDOWS\system32\CTHELPER.EXE
C:\Programmi\Sitecom\Wireless Internet USB Phone\Wireless Internet USB Phone.exe
C:\Programmi\Sitecom\Wireless Internet USB Phone\Wireless Internet USB Phone UI.exe
C:\WINDOWS\vsnpstd3.exe
C:\Programmi\MessengerPlus! 3\MsgPlus.exe
C:\Programmi\Sony Ericsson\Mobile2\Application Launcher\Application Launcher.exe
C:\WINDOWS\system32\hldrrr.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Programmi\FreeNote\freenote.exe
C:\Programmi\Google\GoogleToolbarNotifier\GoogleTo olbarNotifier.exe
C:\Programmi\File comuni\Teleca Shared\CapabilityManager.exe
C:\Programmi\SUPERAntiSpyware\SUPERAntiSpyware.exe
C:\Programmi\Skype\Phone\Skype.exe
C:\Programmi\Messenger\msmsgs.exe
C:\WINDOWS\system32\hldrrr.exe
C:\Programmi\Alice ti aiuta\bin\mpbtn.exe
C:\Programmi\File comuni\Teleca Shared\Generic.exe
C:\Programmi\Sony Ericsson\Mobile2\Mobile Phone Monitor\epmworker.exe
C:\Programmi\MSN Messenger\MsnMsgr.Exe
C:\Programmi\Skype\Plugin Manager\skypePM.exe
C:\Programmi\Bonjour\mDNSResponder.exe
C:\PROGRA~1\Alice\ALICEE~1\app\pppoeservice.exe
C:\WINDOWS\system32\svchost.exe
C:\Programmi\Alwil Software\Avast4\ashMaiSv.exe
C:\Programmi\Alwil Software\Avast4\ashWebSv.exe
C:\Programmi\File comuni\Microsoft Shared\Windows Live\WLLoginProxy.exe
C:\WINDOWS\system32\wuauclt.exe
C:\Programmi\Java\jre1.6.0_01\bin\jucheck.exe
C:\Programmi\Mozilla Firefox\firefox.exe
C:\Hjt\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Connection Wizard,ShellNext = http://www.yesure.com/storm/sort.php/1
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programmi\File comuni\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Programmi\Java\jre1.6.0_01\bin\ssv.dll
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
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
O2 - BHO: Google Toolbar Notifier BHO - {AF69DE43-7D58-4638-B6FA-CE66B5AD205D} - C:\Programmi\Google\GoogleToolbarNotifier\2.0.301. 7164\swg.dll
O2 - BHO: Windows Live Toolbar Helper - {BDBD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Programmi\Windows Live Toolbar\msntb.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\programmi\google\googletoolbar2.dll
O3 - Toolbar: Windows Live Toolbar - {BDAD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Programmi\Windows Live Toolbar\msntb.dll
O4 - HKLM\..\Run: [ATIPTA] C:\Programmi\ATI Technologies\ATI Control Panel\atiptaxx.exe
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [Ma10Pan] Ma10Pan.Exe
O4 - HKLM\..\Run: [Adobe Photo Downloader] "C:\Programmi\Adobe\Photoshop Album Starter Edition\3.2\Apps\apdproxy.exe"
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Programmi\Adobe\Reader 8.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Programmi\Java\jre1.6.0_01\bin\jusched.exe "
O4 - HKLM\..\Run: [QuickTime Task] "C:\Programmi\Ringz Studio\Storm Codec\qttask.exe" -atboottime
O4 - HKLM\..\Run: [CTHelper] CTHELPER.EXE
O4 - HKLM\..\Run: [SitecomWirelessInternetUsbPhone] "C:\Programmi\Sitecom\Wireless Internet USB Phone\Wireless Internet USB Phone.exe"
O4 - HKLM\..\Run: [SitecomWirelessInternetUsbPhoneUI] "C:\Programmi\Sitecom\Wireless Internet USB Phone\Wireless Internet USB Phone UI.exe"
O4 - HKLM\..\Run: [snpstd3] C:\WINDOWS\vsnpstd3.exe
O4 - HKLM\..\Run: [MessengerPlus3] "C:\Programmi\MessengerPlus! 3\MsgPlus.exe"
O4 - HKLM\..\Run: [Sony Ericsson PC Suite] "C:\Programmi\Sony Ericsson\Mobile2\Application Launcher\Application Launcher.exe" /startoptions
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - HKLM\..\Run: [REGSHAVE] C:\Programmi\REGSHAVE\REGSHAVE.EXE /AUTORUN
O4 - HKLM\..\Run: [LXCCCATS] rundll32 C:\WINDOWS\System32\spool\DRIVERS\W32X86\3\LXCCtim e.dll,_RunDLLEntry@16
O4 - HKLM\..\Run: [hldrrr] C:\WINDOWS\system32\hldrrr.exe
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [FreeNote] C:\Programmi\FreeNote\freenote.exe
O4 - HKCU\..\Run: [swg] C:\Programmi\Google\GoogleToolbarNotifier\GoogleTo olbarNotifier.exe
O4 - HKCU\..\Run: [SUPERAntiSpyware] C:\Programmi\SUPERAntiSpyware\SUPERAntiSpyware.exe
O4 - HKCU\..\Run: [Skype] "C:\Programmi\Skype\Phone\Skype.exe" /nosplash /minimized
O4 - HKCU\..\Run: [MSMSGS] "C:\Programmi\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [MessengerPlus3] "C:\Programmi\MessengerPlus! 3\MsgPlus.exe" /WinStart
O4 - HKCU\..\Run: [hldrrr] C:\WINDOWS\system32\hldrrr.exe
O4 - HKCU\..\Run: [msnmsgr] "C:\Programmi\MSN Messenger\MsnMsgr.Exe" /background
O4 - Global Startup: Alice ti aiuta.lnk = C:\Programmi\Alice ti aiuta\bin\matcli.exe
O8 - Extra context menu item: &Windows Live Search - res://C:\Programmi\Windows Live Toolbar\msntb.dll/search.htm
O8 - Extra context menu item: Add to Windows &Live Favorites - http://favorites.live.com/quickadd.aspx
O8 - Extra context menu item: Apri in nuova scheda in primo piano - res://C:\Programmi\Windows Live Toolbar\Components\it-it\msntabres.dll.mui/230?bafc9192eb1047938bb89fa274d7de18
O8 - Extra context menu item: Apri in nuova scheda in secondo piano - res://C:\Programmi\Windows Live Toolbar\Components\it-it\msntabres.dll.mui/229?bafc9192eb1047938bb89fa274d7de18
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.6.0_01\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.6.0_01\bin\ssv.dll
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
O10 - Unknown file in Winsock LSP: c:\programmi\bonjour\mdnsnsp.dll
O17 - HKLM\System\CCS\Services\Tcpip\..\{F50581E4-B38B-4AFE-AB9C-DCA324CF5F32}: NameServer = 85.37.17.17 85.38.28.72
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
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\FILECO~1\Skype\SKYPE4~1.DLL
O20 - Winlogon Notify: !SASWinLogon - C:\Programmi\SUPERAntiSpyware\SASWINLO.dll
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - ALWIL Software - C:\Programmi\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: Ati HotKey Poller - Unknown owner - C:\WINDOWS\system32\Ati2evxx.exe
O23 - Service: ATI Smart - Unknown owner - C:\WINDOWS\system32\ati2sgag.exe
O23 - Service: avast! Antivirus - ALWIL Software - 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: Bonjour Service - Apple Computer, Inc. - C:\Programmi\Bonjour\mDNSResponder.exe
O23 - Service: Google Updater Service (gusvc) - Google - C:\Programmi\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Programmi\File comuni\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: lxcc_device - Lexmark International, Inc. - C:\WINDOWS\system32\lxcccoms.exe
O23 - Service: PPPoE Service (PPPoEService) - Unknown owner - C:\PROGRA~1\Alice\ALICEE~1\app\pppoeservice.exe