Possible Duplicate:
How to reset shortcuts (.lnk file) in Windows 7?
How do you associate the .exe file extension with a program in Windows?
Accidentally caused all .exe programs to open in Notepad
My friend e-mailed me a .lnk file, and I chose to open it with Wordpad. I think the check box for 'always open using this program' was checked, because all of my links now are opened using word pad. Is there a way to undo this?