To fix your registry


Windows Registry Editor Version 5.00

[-HKEY_CLASSES_ROOT\.exe\shell]

[-HKEY_CLASSES_ROOT\.exe\DefaultIcon]

[HKEY_CLASSES_ROOT\.exe]
@="exefile"

[HKEY_CLASSES_ROOT\exefile]
"Content Type"=-

[HKEY_CLASSES_ROOT\exefile\shell\open\command]
@="\"%1\" %*"
"IsolatedCommand"=-

[HKEY_CLASSES_ROOT\exefile\shell\runas\command]
"IsolatedCommand"=-

[HKEY_CLASSES_ROOT\.bat]
@="batfile"

[HKEY_CLASSES_ROOT\batfile\shell\open\command]
@="\"%1\" %*"

[-HKEY_CURRENT_USER\SOFTWARE\Classes\.exe]

[-HKEY_CURRENT_USER\Software\Classes\exefile]

[-HKEY_CLASSES_ROOT\secfile]

[-HKEY_CURRENT_USER\Software\Classes\secfile]

[-HKEY_CLASSES_ROOT\pezfile]

[-HKEY_CURRENT_USER\Software\Classes\pezfile]

[-HKEY_CLASSES_ROOT\sezfile]

[-HKEY_CURRENT_USER\Software\Classes\sezfile]

[-HKEY_CLASSES_ROOT\ah]

[-HKEY_CURRENT_USER\Software\Classes\ah]

[HKEY_LOCAL_MACHINE\SOFTWARE\Clients\StartMenuInternet\FIREFOX.EXE\shell\open\command]
@="firefox.exe"
 
[HKEY_LOCAL_MACHINE\SOFTWARE\Clients\StartMenuInternet\FIREFOX.EXE\shell\safemode\command]
@="firefox.exe"

[HKEY_LOCAL_MACHINE\SOFTWARE\Clients\StartMenuInternet\IEXPLORE.EXE\shell\open\command]
@="iexplore.exe"