Please read http://answers.microsoft.com/en-us/windows/forum/windows_vista-desktop/right-click-open-with-command-missing-help-please/a9c3f139-075c-4285-b87d-25e899fb8b27 It's the same for Windows 7.
hello & thanks,
win7 x64
my "open with" stopped working.
is there a freeware to use instead of win7 "open with"?
nirsoft doesn't do the trick.
vm

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic