well, someone advised me to run hijack this and post the results here...i hope thos helps solving my problem, wich i already mention in the thread "firefox trouble"

Logfile of HijackThis v1.99.1
Scan saved at 0:18:53, on 03-09-2006
Platform: Windows XP (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 (6.00.2600.0000)

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:\Programas\Ficheiros comuns\Symantec Shared\ccSetMgr.exe
C:\WINDOWS\Explorer.EXE
C:\Programas\Ficheiros comuns\Symantec Shared\ccEvtMgr.exe
C:\Programas\Ficheiros comuns\Symantec Shared\SNDSrvc.exe
C:\Programas\Ficheiros comuns\Symantec Shared\CCPD-LC\symlcsvc.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Programas\Norton AntiVirus\navapsvc.exe
C:\Programas\Norton AntiVirus\IWP\NPFMntor.exe
C:\WINDOWS\System32\nvsvc32.exe
C:\Programas\Ficheiros comuns\Panda Software\PavShld\pavprsrv.exe
C:\WINDOWS\System32\RUNDLL32.EXE
C:\WINDOWS\System32\rundll32.exe
C:\WINDOWS\system32\ZoneLabs\vsmon.exe
C:\Programas\Zone Labs\ZoneAlarm\zlclient.exe
C:\Programas\MessengerPlus! 3\MsgPlus.exe
C:\Programas\Java\jre1.5.0_03\bin\jusched.exe
C:\Programas\Ficheiros comuns\Real\Update_OB\realsched.exe
C:\Programas\Ficheiros comuns\Symantec Shared\ccApp.exe
C:\Programas\D-Tools\daemon.exe
C:\Programas\Messenger\msmsgs.exe
C:\Programas\Ficheiros comuns\Symantec Shared\Security Console\NSCSRVCE.EXE
C:\Programas\LimeWire\LimeWire.exe
C:\Documents and Settings\El_Bashe!\Ambiente de trabalho\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Hiperligações
R3 - URLSearchHook: (no name) - {00A6FAF6-072E-44cf-8957-5838F569A31D} - C:\Programas\MyWebSearch\SrchAstt\2.bin\MWSSRCAS.DLL
O2 - BHO: MyWebSearch Search Assistant BHO - {00A6FAF1-072E-44cf-8957-5838F569A31D} - C:\Programas\MyWebSearch\SrchAstt\2.bin\MWSSRCAS.DLL
O2 - BHO: NAV Helper - {A8F38D8D-E480-4D52-B7A2-731BB6995FDD} - C:\Programas\Norton AntiVirus\NavShExt.dll
O3 - Toolbar: &Rádio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O3 - Toolbar: Norton AntiVirus - {C4069E3A-68F1-403E-B40E-20066696354B} - C:\Programas\Norton AntiVirus\NavShExt.dll
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\System32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\System32\NvMcTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [AdslTaskBar] rundll32.exe stmctrl.dll,TaskBar
O4 - HKLM\..\Run: [Zone Labs Client] "C:\Programas\Zone Labs\ZoneAlarm\zlclient.exe"
O4 - HKLM\..\Run: [MessengerPlus3] "C:\Programas\MessengerPlus! 3\MsgPlus.exe"
O4 - HKLM\..\Run: [APVXDWIN] "C:\Programas\Panda Software\Panda Antivirus Titanium\APVXDWIN.EXE" /s
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Programas\Java\jre1.5.0_03\bin\jusched.exe
O4 - HKLM\..\Run: [TkBellExe] "C:\Programas\Ficheiros comuns\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [ccApp] "C:\Programas\Ficheiros comuns\Symantec Shared\ccApp.exe"
O4 - HKLM\..\Run: [SSC_UserPrompt] "C:\Programas\Ficheiros comuns\Symantec Shared\Security Center\UsrPrmpt.exe"
O4 - HKLM\..\Run: [DAEMON Tools-1033] "C:\Programas\D-Tools\daemon.exe" -lang 1033
O4 - HKCU\..\Run: [MSMSGS] "C:\Programas\Messenger\msmsgs.exe" /background
O4 - Global Startup: Adobe Reader Speed Launch.lnk = C:\Programas\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O4 - Global Startup: Microsoft Office.lnk = C:\Programas\Microsoft Office\Office10\OSA.EXE
O8 - Extra context menu item: &Search - http://edits.mywebsearch.com/toolbar...tml?p=ZNfox000
O8 - Extra context menu item: E&xportar para o Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000
O17 - HKLM\System\CCS\Services\Tcpip\..\{1EE57953-91CB-4857-BE91-18EB8B7B724A}: NameServer = 194.65.100.117
O17 - HKLM\System\CS2\Services\Tcpip\..\{1EE57953-91CB-4857-BE91-18EB8B7B724A}: NameServer = 194.65.100.117
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - "C:\PROGRA~1\MSNMES~1\msgrapp.dll" (file missing)
O20 - AppInit_DLLs: MsgPlusLoader.dll
O23 - Service: Symantec Event Manager (ccEvtMgr) - Symantec Corporation - C:\Programas\Ficheiros comuns\Symantec Shared\ccEvtMgr.exe
O23 - Service: Symantec Settings Manager (ccSetMgr) - Symantec Corporation - C:\Programas\Ficheiros comuns\Symantec Shared\ccSetMgr.exe
O23 - Service: iPod Service (iPodService) - Apple Computer, Inc. - C:\Programas\iPod\bin\iPodService.exe
O23 - Service: Norton AntiVirus Auto-Protect Service (navapsvc) - Symantec Corporation - C:\Programas\Norton AntiVirus\navapsvc.exe
O23 - Service: Norton AntiVirus Firewall Monitor Service (NPFMntor) - Symantec Corporation - C:\Programas\Norton AntiVirus\IWP\NPFMntor.exe
O23 - Service: Norton Protection Center Service (NSCService) - Symantec Corporation - C:\Programas\Ficheiros comuns\Symantec Shared\Security Console\NSCSRVCE.EXE
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\System32\nvsvc32.exe
O23 - Service: Panda Process Protection Service (PavPrSrv) - Panda Software - C:\Programas\Ficheiros comuns\Panda Software\PavShld\pavprsrv.exe
O23 - Service: Symantec AVScan (SAVScan) - Symantec Corporation - C:\Programas\Norton AntiVirus\SAVScan.exe
O23 - Service: Symantec Network Drivers Service (SNDSrvc) - Symantec Corporation - C:\Programas\Ficheiros comuns\Symantec Shared\SNDSrvc.exe
O23 - Service: SPBBCSvc - Symantec Corporation - C:\Programas\Ficheiros comuns\Symantec Shared\SPBBC\SPBBCSvc.exe
O23 - Service: Symantec Core LC - Symantec Corporation - C:\Programas\Ficheiros comuns\Symantec Shared\CCPD-LC\symlcsvc.exe
O23 - Service: TrueVector Internet Monitor (vsmon) - Zone Labs, LLC - C:\WINDOWS\system32\ZoneLabs\vsmon.exe

i have no ideia if i should delete/repair any of these files...if someone can help me, thanks.

Please get the Critical Updates for your system from here:
http://update.microsoft.com/windowsu....aspx?ln=en-us

Then explain what problems you are having with Firefox and post a new log.