I would like to find out why is my computer suddenly so slow.

Here is my Hijackthis logfile:

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 7:24:22 PM, on 12/16/2007
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)
Boot mode: Normal

Running processes:
D:\WINDOWS\System32\smss.exe
D:\WINDOWS\system32\winlogon.exe
D:\WINDOWS\system32\services.exe
D:\WINDOWS\system32\lsass.exe
D:\WINDOWS\system32\svchost.exe
D:\WINDOWS\System32\svchost.exe
D:\WINDOWS\system32\spoolsv.exe
D:\WINDOWS\Explorer.EXE
D:\PROGRA~1\Grisoft\AVG7\avgcc.exe
D:\Program Files\Grisoft\AVG Anti-Spyware 7.5\avgas.exe
D:\Program Files\Common Files\Real\Update_OB\realsched.exe
D:\WINDOWS\system32\ctfmon.exe
D:\Program Files\iolo\System Mechanic Professional 7\SMSystemAnalyzer.exe
D:\Program Files\Grisoft\AVG Anti-Spyware 7.5\guard.exe
D:\PROGRA~1\Grisoft\AVG7\avgamsvr.exe
D:\PROGRA~1\Grisoft\AVG7\avgupsvc.exe
D:\PROGRA~1\Grisoft\AVG7\avgemc.exe
D:\WINDOWS\system32\nvsvc32.exe
D:\WINDOWS\system32\HPZipm12.exe
D:\Program Files\SolidDocuments\SolidConverterPDF\SCPDF\SolidPdfService.exe
D:\WINDOWS\system32\svchost.exe
D:\WINDOWS\System32\svchost.exe
D:\WINDOWS\system32\wuauclt.exe
D:\WINDOWS\system32\wscntfy.exe
D:\Program Files\Trend Micro\HijackThis\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page =
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - D:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: Skype add-on (mastermind) - {22BF413B-C6D2-4d91-82A9-A0F997BA588C} - D:\Program Files\Skype\Toolbars\Internet Explorer\SkypeIEPlugin.dll
O2 - BHO: Solid Converter PDF - {259F616C-A300-44F5-B04A-ED001A26C85C} - D:\Program Files\SolidDocuments\SolidConverterPDF\SCPDF\ExploreExtPDF.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - D:\Program Files\Java\jre1.6.0_02\bin\ssv.dll
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O2 - BHO: AcroIEToolbarHelper Class - {AE7CD045-E861-484f-8273-0445EE161910} - D:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll
O3 - Toolbar: Adobe PDF - {47833539-D0C5-4125-9FA8-0819E2EAAC93} - D:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll
O3 - Toolbar: Solid Converter PDF - {259F616C-A300-44F5-B04A-ED001A26C85C} - D:\Program Files\SolidDocuments\SolidConverterPDF\SCPDF\ExploreExtPDF.dll
O4 - HKLM\..\Run: [AVG7_CC] D:\PROGRA~1\Grisoft\AVG7\avgcc.exe /STARTUP
O4 - HKLM\..\Run: [!AVG Anti-Spyware] "D:\Program Files\Grisoft\AVG Anti-Spyware 7.5\avgas.exe" /minimized
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE D:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [TkBellExe] "D:\Program Files\Common Files\Real\Update_OB\realsched.exe" -osboot
O4 - HKCU\..\Run: [ctfmon.exe] D:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [SMSystemAnalyzer] "D:\Program Files\iolo\System Mechanic Professional 7\SMSystemAnalyzer.exe"
O4 - HKUS\S-1-5-19\..\Run: [AVG7_Run] D:\PROGRA~1\Grisoft\AVG7\avgw.exe /RUNONCE (User 'LOCAL SERVICE')
O4 - HKUS\S-1-5-20\..\Run: [AVG7_Run] D:\PROGRA~1\Grisoft\AVG7\avgw.exe /RUNONCE (User 'NETWORK SERVICE')
O4 - HKUS\S-1-5-18\..\Run: [AVG7_Run] D:\PROGRA~1\Grisoft\AVG7\avgw.exe /RUNONCE (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [AVG7_Run] D:\PROGRA~1\Grisoft\AVG7\avgw.exe /RUNONCE (User 'Default user')
O8 - Extra context menu item: Convert link target to Adobe PDF - res://D:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIECapture.html
O8 - Extra context menu item: Convert link target to existing PDF - res://D:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIEAppend.html
O8 - Extra context menu item: Convert selected links to Adobe PDF - res://D:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIECaptureSelLinks.html
O8 - Extra context menu item: Convert selected links to existing PDF - res://D:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIEAppendSelLinks.html
O8 - Extra context menu item: Convert selection to Adobe PDF - res://D:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIECapture.html
O8 - Extra context menu item: Convert selection to existing PDF - res://D:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIEAppend.html
O8 - Extra context menu item: Convert to Adobe PDF - res://D:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIECapture.html
O8 - Extra context menu item: Convert to existing PDF - res://D:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIEAppend.html
O8 - Extra context menu item: E&xport to Microsoft Excel - res://D:\PROGRA~1\MICROS~2\Office12\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - D:\Program Files\Java\jre1.6.0_02\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - D:\Program Files\Java\jre1.6.0_02\bin\ssv.dll
O9 - Extra button: Skype - {77BF5300-1474-4EC7-9980-D32B190E9B07} - D:\Program Files\Skype\Toolbars\Internet Explorer\SkypeIEPlugin.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - D:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O9 - Extra button: (no name) - {CD67F990-D8E9-11d2-98FE-00C0F0318AFE} - (no file)
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - D:\Program Files\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - D:\Program Files\Messenger\msmsgs.exe
O9 - Extra button: (no name) - SolidConverterPDF - (no file) (HKCU)
O16 - DPF: {ED28050F-D713-43BA-A376-DCC5C35407D5} (MsnMusicAx Class) - http://entimg.msn.com/client/msnmusax5815.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{88F839D3-FC9A-489B-986F-ABF1814968F7}: NameServer = 194.106.162.10,194.106.162.3
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - D:\PROGRA~1\COMMON~1\Skype\SKYPE4~1.DLL
O23 - Service: AVG Anti-Spyware Guard - GRISOFT s.r.o. - D:\Program Files\Grisoft\AVG Anti-Spyware 7.5\guard.exe
O23 - Service: AVG7 Alert Manager Server (Avg7Alrt) - GRISOFT, s.r.o. - D:\PROGRA~1\Grisoft\AVG7\avgamsvr.exe
O23 - Service: AVG7 Update Service (Avg7UpdSvc) - GRISOFT, s.r.o. - D:\PROGRA~1\Grisoft\AVG7\avgupsvc.exe
O23 - Service: AVG E-mail Scanner (AVGEMS) - GRISOFT, s.r.o. - D:\PROGRA~1\Grisoft\AVG7\avgemc.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - D:\WINDOWS\system32\nvsvc32.exe
O23 - Service: Pml Driver HPZ12 - HP - D:\WINDOWS\system32\HPZipm12.exe
O23 - Service: SolidPDFConverterReadSpool (ScReadSpool) - VoyagerSoft, LLC - D:\Program Files\SolidDocuments\SolidConverterPDF\SCPDF\SolidPdfService.exe

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End of file - 6772 bytes


Thanks!