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when I open Firefox I have to try several times because a Runtime Error with the program C:\Windows\System32\regsvr32.exe

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when I open Firefox I have to try several times because a Runtime Error with the program C:\Windows\System32\regsvr32.exe

when I open Firefox I have to try several times because a Runtime Error with the program C:\Windows\System32\regsvr32.exe

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Try the Firefox Safe Mode to see how it works there. The Safe Mode is a troubleshooting mode, which disables most add-ons.

(If you're not using it, switch to the Default theme.)

  • You can open the Firefox 4.0+ Safe Mode by holding the Shift key when you use the Firefox desktop or Start menu shortcut.
  • Or use the Help menu item and click on the Restart with Add-ons Disabled... menu item while Firefox is running.

Don't select anything right now, just use "Continue in Safe Mode." To exit the Firefox Safe Mode, just close Firefox and wait a few seconds before using the Firefox shortcut (without the Shift key) to open it again. If it is good in the Firefox Safe Mode, your problem is probably caused by an extension, and you need to figure out which one.

Please follow the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article for that.

When you figure out what's causing your issues, please let us know. It might help other users who have the same problem.

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The program regsvr32.exe is most often used to change "default" applications, i.e., the application Windows will use for a particular kind of content. If your various browsers are struggling for supremacy as to which one will be the default browser, you might want to set them all NOT to check or change that, and only change it manually yourself.