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cant start firefox or internet explorer on my vista windows laptop-"cant loadxpcom"

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  • 3 have this problem
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  • Last reply by cor-el

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Tried system restore,no luck. I downloaded a file to download utube music to media player. Ran spybot ,found 2 bad files, tried to get rid of and must of delated something not suppose to.

Tried system restore,no luck. I downloaded a file to download utube music to media player. Ran spybot ,found 2 bad files, tried to get rid of and must of delated something not suppose to.

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This issue is usually caused by an incomplete update that didn't replace all files in the Firefox program folder. Possible causes are security software that protects or locks files in the Firefox program folder. In such cases it is best to remove (delete) the Firefox program folder and do a clean reinstall.


Do a clean reinstall and delete the Firefox program folder before (re)installing a fresh copy of the current Firefox release.

If possible uninstall your current Firefox version to cleanup the Windows registry and settings in security software.

  • Do NOT remove "personal data" when you uninstall your current Firefox version, because this will remove all profile folders and you lose personal data like bookmarks and passwords including data in profiles created by other Firefox versions.

Remove the Firefox program folder before installing that newly downloaded copy of the Firefox installer.

  • (32 bit Windows) "C:\Program Files\Mozilla Firefox\"
  • (64 bit Windows) "C:\Program Files (x86)\Mozilla Firefox\"

Your bookmarks and other personal data are stored in the Firefox profile folder and won't be affected by an uninstall and (re)install, but make sure NOT to remove personal data when you uninstall Firefox as that will remove all Firefox profile folders and you lose your personal data.


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You also said you can't use Win IE?

Perform a System File Check to fix corrupted system files http://www.sevenforums.com/tutorials/1538-sfc-scannow-command-system-file-checker.html

http://support.microsoft.com/fixit/ Microsoft Fix it Solution Center: troubleshooting software issues

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Boot the computer in Windows Safe Mode with network support (press F8 on the boot screen) as a test.


Do a malware check with several malware scanning programs on the Windows computer. Please scan with all programs because each program detects different malware. All these programs have free versions.

Make sure that you update each program to get the latest version of their databases before doing a scan.

You can also do a check for a rootkit infection with TDSSKiller.

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