se me cuelga todo , todo el tiempo

[vaneitalia]

desde hace varios dias la computadora se me cuelga constantemente sin importar que es lo que haga. a veces es navegando o en chateando, a veces revisando mis carpetas y hasta sin hacer nada. si pasa un rato y vuelvo a querer utilizarlo me encuentro con que no puedo salir del salvapantallas.si reinicio funciona bien unos minutos y vuelve a pasar lo mismo.
lo unico extraño que encuentro es que tengo 2 peliculas que no puedo borrar en la carpeta de documentos (siempre me dice que el archivo lo esta utilizando un programa y por eso no puedo borrarlo)
hice una limpieza con todo lo que tengo:
kaspersky antivirus, avg antispyware, ad aware, reg seeker y disk clean. tambien tengo actualizados el spybot y el spyware blaster. y salvo cookies ninguno encontro nada.

aqui le mando los datos del hijackthis para que vean si tengo que borrar algo. desde ya muchismas gracias !!!

Logfile of HijackThis v1.99.1
Scan saved at 3.17.24, on 03/03/2007
Platform: Windows XP SP1 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)

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:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\System32\keyhook.exe
C:\Programmi\QuickTime\qttask.exe
C:\Programmi\Zone Labs\ZoneAlarm\zlclient.exe
C:\Programmi\USB Product Driver v2.12r003\shwicon.exe
C:\Programmi\WMonitor\InfoMyCa.exe
C:\Programmi\File comuni\Real\Update_OB\realsched.exe
C:\Programmi\Grisoft\AVG Anti-Spyware 7.5\avgas.exe
C:\Programmi\Muiltmedia keyboard Utility\2.0\KbdAp32A.exe
C:\Programmi\WMonitor\WLService.exe
C:\Programmi\WMonitor\WLanCfgG.exe
C:\Programmi\File comuni\Microsoft Shared\VS7DEBUG\MDM.EXE
C:\Programmi\Analog Devices\SoundMAX\SMAgent.exe
C:\WINDOWS\System32\svchost.exe
C:\Programmi\MSN Messenger\MsnMsgr.Exe
C:\WINDOWS\system32\ZoneLabs\vsmon.exe
C:\Programmi\ArcSoft\PhotoImpression 5\PI Monitor.exe
C:\Programmi\MSN Messenger\usnsvc.exe
C:\Programmi\Internet Explorer\iexplore.exe
C:\Programmi\Internet Explorer\iexplore.exe
C:\Programmi\HJT\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://es.rd.yahoo.com/customize/yco...//es.yahoo.com
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.msn.it/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://es.yahoo.com
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://es.yahoo.com
R1 - HKCU\Software\Microsoft\Internet Explorer\SearchURL,(Default) = http://es.rd.yahoo.com/customize/yco...//es.yahoo.com
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page =
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Int ernet Settings,ProxyOverride = localhost
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
R3 - URLSearchHook: Yahoo! Barra de herramientas - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Programmi\Yahoo!\Companion\Installs\cpn0\yt.dll
O2 - BHO: Yahoo! Toolbar Helper - {02478D38-C3F9-4EFB-9B51-7695ECA05670} - C:\Programmi\Yahoo!\Companion\Installs\cpn0\yt.dll
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programmi\Adobe\Acrobat 5.0\Reader\ActiveX\AcroIEHelper.ocx
O2 - BHO: (no name) - {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: Windows Live Sign-in Helper - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Programmi\File comuni\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: (no name) - {A5366673-E8CA-11D3-9CD9-0090271D075B} - (no file)
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\programmi\google\googletoolbar3.dll
O3 - Toolbar: Easy-WebPrint - {327C2873-E90D-4c37-AA9D-10AC9BABA46C} - C:\Programmi\Canon\Easy-WebPrint\Toolband.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O3 - Toolbar: Yahoo! Barra de herramientas - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Programmi\Yahoo!\Companion\Installs\cpn0\yt.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\programmi\google\googletoolbar3.dll
O4 - HKLM\..\Run: [SiSUSBRG] C:\WINDOWS\SiSUSBrg.exe
O4 - HKLM\..\Run: [SiS Windows KeyHook] C:\WINDOWS\System32\keyhook.exe
O4 - HKLM\..\Run: [NeroCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Programmi\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [Zone Labs Client] "C:\Programmi\Zone Labs\ZoneAlarm\zlclient.exe"
O4 - HKLM\..\Run: [ShowIcon_MicSys_USB Product Driver v2.12r003] "C:\Programmi\USB Product Driver v2.12r003\shwicon.exe" -t"MicSys\USB Product Driver v2.12r003"
O4 - HKLM\..\Run: [Getca] C:\Programmi\WMonitor\InfoMyCa.exe
O4 - HKLM\..\Run: [LWBMOUSE] C:\Programmi\Browser Mouse\Browser Mouse\1.0\lwbwheel.exe
O4 - HKLM\..\Run: [TkBellExe] "C:\Programmi\File comuni\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [!AVG Anti-Spyware] "C:\Programmi\Grisoft\AVG Anti-Spyware 7.5\avgas.exe" /minimized
O4 - HKLM\..\Run: [FLMOFFICE4DMOUSE] C:\Programmi\Browser Mouse\mouse32a.exe
O4 - HKLM\..\Run: [FLMK08KB] C:\Programmi\Muiltmedia keyboard Utility\2.0\KbdAp32A.exe
O4 - HKCU\..\Run: [MsnMsgr] "C:\Programmi\MSN Messenger\MsnMsgr.Exe" /background
O4 - Global Startup: PI Monitor.lnk = C:\Programmi\ArcSoft\PhotoImpression 5\PI Monitor.exe
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Control Panel present
O6 - HKLM\Software\Policies\Microsoft\Internet Explorer\Control Panel present
O8 - Extra context menu item: E&xportar a Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: Web Anti-Virus - {1F460357-8A94-4D71-9CA3-AA4ACF32ED8E} - C:\Programmi\Kaspersky Lab\Kaspersky Internet Security 6.0\scieplugin.dll
O9 - Extra button: Messenger - {4528BBE0-4E08-11D5-AD55-00010333D0AD} - C:\PROGRA~1\Yahoo!\Common\yhexbmesar.dll
O9 - Extra 'Tools' menuitem: Yahoo! Messenger - {4528BBE0-4E08-11D5-AD55-00010333D0AD} - C:\PROGRA~1\Yahoo!\Common\yhexbmesar.dll
O9 - Extra button: Referencia - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O9 - Extra button: Descargas - {AF0828BC-CB46-4C8D-95B6-8A7C4988F9FF} - C:\WINDOWS\System32\shdocvw.dll
O9 - Extra button: FlashGet - {D6E814A0-E0C5-11d4-8D29-0050BA6940E3} - C:\WINDOWS\System32\shdocvw.dll
O9 - Extra 'Tools' menuitem: &FlashGet - {D6E814A0-E0C5-11d4-8D29-0050BA6940E3} - C:\WINDOWS\System32\shdocvw.dll
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programmi\Messenger\MSMSGS.EXE
O9 - Extra 'Tools' menuitem: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programmi\Messenger\MSMSGS.EXE
O12 - Plugin for .spop: C:\Programmi\Internet Explorer\Plugins\NPDocBox.dll
O16 - DPF: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) - http://go.microsoft.com/fwlink/?linkid=39204
O16 - DPF: {193C772A-87BE-4B19-A7BB-445B226FE9A1} (ewidoOnlineScan Control) - http://downloads.ewido.net/ewidoOnlineScan.cab
O16 - DPF: {2BC66F54-93A8-11D3-BEB6-00105AA9B6AE} (Symantec AntiVirus scanner) - http://security.symantec.com/sscv6/S...in/AvSniff.cab
O16 - DPF: {30528230-99F7-4BB4-88D8-FA1D4F56A2AB} (YInstStarter Class) - http://us.dl1.yimg.com/download.yaho...st_current.cab
O16 - DPF: {51641EF3-8A7A-4D84-8659-B0911E947CC8} - http://www.contenidospc.com/instalador.cab
O16 - DPF: {56336BCB-3D8A-11D6-A00B-0050DA18DE71} - http://software-dl.real.com/21d200a9...dxIE601_es.cab
O16 - DPF: {644E432F-49D3-41A1-8DD5-E099162EEEC5} (Symantec RuFSI Utility Class) - http://security.symantec.com/sscv6/S.../bin/cabsa.cab
O16 - DPF: {6596829B-37D4-40AD-971B-1E9041725C52} - http://www.direct-ip.com/deliver/global/ms.cab
O16 - DPF: {F00F4763-7355-4725-82F7-0DA94A256D46} - http://www2.incredimail.com/contents...r/imloader.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{AFA40AA4-63D3-4457-BAEB-985E0ABDD521}: NameServer = 80.58.0.33,80.58.32.97
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
O20 - Winlogon Notify: klogon - C:\WINDOWS\System32\klogon.dll
O20 - Winlogon Notify: WRNotifier - WRLogonNTF.dll (file missing)
O23 - Service: 54Mbps Wireless Network Service (54Mbps Wireless Network) - Unknown owner - C:\Programmi\WMonitor\WLService.exe
O23 - Service: AVG Anti-Spyware Guard - Anti-Malware Development a.s. - C:\Programmi\Grisoft\AVG Anti-Spyware 7.5\guard.exe
O23 - Service: Kaspersky Internet Security 6.0 (AVP) - Unknown owner - C:\Programmi\Kaspersky Lab\Kaspersky Internet Security 6.0\avp.exe" -r (file missing)
O23 - Service: SmartLinkService (SLService) - Unknown owner - slserv.exe (file missing)
O23 - Service: SoundMAX Agent Service (SoundMAX Agent Service (default)) - Analog Devices, Inc. - C:\Programmi\Analog Devices\SoundMAX\SMAgent.exe
O23 - Service: TrueVector Internet Monitor (vsmon) - Zone Labs, LLC - C:\WINDOWS\system32\ZoneLabs\vsmon.exe