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Q. Firefox.exe not executing after double clicking on it. But if we rename executable file from firefox.exe to firefox1.exe. Then it executes and working fine.

Solution

• Go to start > run and type regedit and press enter
• Then go to following registry entry [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\firefox.exe]

Expand the firefox.exe key value and remove the below mentioned value as Debugger

    *"Debugger"="\"C:\\windows\\twunk_16.exe\""*

• Once done close registry editor and then execute firefox.exe again, it should work now.

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