Unable to start an EXE (prompt with Open With window)
This issue may happen after a virus infection.
Create a new .reg file in notepad with the following information and merge it with you registry :
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FixeEXE.reg
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REGEDIT4
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System] “DisableRegistryTools”=dword:00000000
[HKEY_LOCAL_MACHINE\Software\CLASSES\exefile\shell\open\command] @=”\”%1\” %*”
[HKEY_LOCAL_MACHINE\Software\CLASSES\batfile\shell\open\command] @=”\”%1\” %*”
[HKEY_LOCAL_MACHINE\Software\CLASSES\comfile\shell\open\command] @=”\”%1\” %*”
[HKEY_LOCAL_MACHINE\Software\CLASSES\piffile\shell\open\command] @=”\”%1\” %*”
[HKEY_LOCAL_MACHINE\Software\CLASSES\scrfile\shell\open\command] @=”\”%1\” %*”
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Source : http://support.microsoft.com/?kbid=837334