ciao a tutti, mi sono appena iscritto , quindi perdonate la mia niubbaggine!

Ho una serie di problemi e ve li elenco qui:

1- sempre piu spesso quando faccio ricerche o tento semplicemente di accedere a una pagina in rete(sia IE che FF), mi si chiudono da sole tutte le finestre senza nessun messaggio di avviso
2- sempre piu spesso quando tento di aprire certi programmi (come hijack) mi si chiudono tutti da soli senza messaggio di errore..
3- spessissimo mi si blocca tutto, scompare tutto, e rimango solo con l immagine del desktop; a questo punto faccio ctrl alt canc e riavvio..ma è un continuo!!!

Non mi permette di fare nessuna scansione e nessun log di hijack. L'ultimo che sono riuscito a fare stamattina è stato questo:

Logfile of HijackThis v1.99.1
Scan saved at 10.44.45, on 29/04/2007
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16414)
Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\csrss.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\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Programmi\Apoint2K\Apoint.exe
C:\Programmi\TOSHIBA\Power Management\CePMTray.exe
C:\Programmi\TOSHIBA\E-KEY\CeEKey.exe
C:\Programmi\TOSHIBA\TouchPad\TPTray.exe
C:\PROGRA~1\Grisoft\AVG7\avgcc.exe
C:\windows\system32\winlogon.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Programmi\Apoint2K\Apntex.exe
C:\PROGRA~1\Grisoft\AVG7\avgamsvr.exe
C:\PROGRA~1\Grisoft\AVG7\avgupsvc.exe
C:\PROGRA~1\Grisoft\AVG7\avgemc.exe
C:\WINDOWS\system32\svchost.exe
C:\Programmi\TOSHIBA\Power Management\CeEPwrSvc.exe
C:\WINDOWS\System32\nvsvc32.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\wbem\wmiprvse.exe
C:\WINDOWS\System32\alg.exe
C:\Programmi\WinRAR\WinRAR.exe
C:\DOCUME~1\media\IMPOST~1\Temp\Rar$EX00.000\Hijac kThis.exe
C:\WINDOWS\system32\wuauclt.exe
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.libero.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
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Int ernet Settings,ProxyOverride = localhost
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
F2 - REG:system.ini: Shell=explorer.exe
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programmi\Adobe\Acrobat 6.0\Reader\ActiveX\AcroIEHelper.dll
O2 - BHO: Windows Live Sign-in Helper - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Programmi\File comuni\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\System32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [Apoint] C:\Programmi\Apoint2K\Apoint.exe
O4 - HKLM\..\Run: [CeEPOWER] C:\Programmi\TOSHIBA\Power Management\CePMTray.exe
O4 - HKLM\..\Run: [CeEKEY] C:\Programmi\TOSHIBA\E-KEY\CeEKey.exe
O4 - HKLM\..\Run: [TPNF] C:\Programmi\TOSHIBA\TouchPad\TPTray.exe
O4 - HKLM\..\Run: [AVG7_CC] C:\PROGRA~1\Grisoft\AVG7\avgcc.exe /STARTUP
O4 - HKLM\..\Run: [QuickTime Task] "C:\Programmi\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [iTunesHelper] "C:\Programmi\iTunes\iTunesHelper.exe"
O4 - HKLM\..\Run: [srvtatqb] "c:\windows\system32\srvtatqb.exe"
O4 - HKCU\..\Run: [LDM] C:\Programmi\Logitech\Desktop Messenger\8876480\Program\BackWeb-8876480.exe
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - Global Startup: Logitech Desktop Messenger.lnk = C:\Programmi\Logitech\Desktop Messenger\8876480\Program\LDMConf.exe
O11 - Options group: [INTERNATIONAL] International*
O16 - DPF: {00B71CFB-6864-4346-A978-C0A14556272C} (Checkers Class) - http://messenger.zone.msn.com/binary...r.cab31267.cab
O16 - DPF: {14B87622-7E19-4EA8-93B3-97215F77A6BC} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary...t.cab31267.cab
O16 - DPF: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) - http://go.microsoft.com/fwlink/?link...67&clcid=0x409
O16 - DPF: {1EDF25DE-DFB2-40CA-AA83-30AE7DA8C203} (FileSharingCtrl Class) - http://appdirectory.messenger.msn.co...haringctrl.cab
O16 - DPF: {2917297F-F02B-4B9D-81DF-494B6333150B} (Minesweeper Flags Class) - http://messenger.zone.msn.com/binary...r.cab31267.cab
O16 - DPF: {4F1E5B1A-2A80-42CA-8532-2D05CB959537} (MSN Photo Upload Tool) - http://chezzoccolo.spaces.live.com//...d/MsnPUpld.cab
O16 - DPF: {8E0D4DE5-3180-4024-A327-4DFAD1796A8D} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary...t.cab31267.cab
O16 - DPF: {9122D757-5A4F-4768-82C5-B4171D8556A7} (PhotoPickConvert Class) - http://appdirectory.messenger.msn.co...p/PhtPkMSN.cab
O16 - DPF: {BD393C14-72AD-4790-A095-76522973D6B8} (CBreakshotControl Class) - http://messenger.zone.msn.com/binary...t.cab31267.cab
O16 - DPF: {F6BF0D00-0B2A-4A75-BF7B-F385591623AF} (Solitaire Showdown Class) - http://messenger.zone.msn.com/binary...n.cab31267.cab
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: talkto - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\MSNMES~1\MSGRAP~1.DLL
O20 - Winlogon Notify: WgaLogon - C:\WINDOWS\SYSTEM32\WgaLogon.dll
O21 - SSODL: WPDShServiceObj - {AAA288BA-9A4C-45B0-95D7-94D524869DB5} - C:\WINDOWS\system32\WPDShServiceObj.dll
O23 - Service: AVG7 Alert Manager Server (Avg7Alrt) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVG7\avgamsvr.exe
O23 - Service: AVG7 Update Service (Avg7UpdSvc) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVG7\avgupsvc.exe
O23 - Service: AVG E-mail Scanner (AVGEMS) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVG7\avgemc.exe
O23 - Service: CeEPwrSvc - COMPAL ELECTRONIC INC. - C:\Programmi\TOSHIBA\Power Management\CeEPwrSvc.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: NVIDIA Driver Helper Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\System32\nvsvc32.exe
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\system32\HPZipm12.exe
O23 - Service: Sony SPTI Service (SPTISRV) - Sony Corporation - C:\PROGRA~1\FILECO~1\SONYSH~1\AVLib\Sptisrv.exe

volevo fixare la voce O4 - HKLM\..\Run: [srvtatqb] "c:\windows\system32\srvtatqb.exe" in modalita provvisioria perche una scansione di avg (che comunque non riesco a completare) mi diceva che si trattava di un errore ma anche in mod prov mi si chiude tutto subito..

Ora, quello che ho fatto finora è stato andare su esegui e ho cancellato la voce explorer.it (mi è stato detto di fare da un mio amico che ne capisce piu di me..) ora però non so come muovermi perchè non mi permette di fare quasi niente

Se serve saperlo ho un pentium 4, windows xp.. grazie mille e buona domenica a tutti!!!