REGEDIT4 

[HKEY_CLASSES_ROOT\msnim] 
@="URL:msnim Protocol" 
"URL Protocol"="" 

[HKEY_CLASSES_ROOT\msnim\shell] 

[HKEY_CLASSES_ROOT\msnim\shell\open] 

[HKEY_CLASSES_ROOT\msnim\shell\open\command] 
@="\"C:\\Program Files\\Internet Explorer\\iexplore.exe\" \"%1\""