Hi,
Reset the lnk - Shortcut link (LNK) files.
Restore Default Windows 7 File Extension Type Associations
http://www.sevenforums.com/tutorials/19449-default-file-type-associations-restore.html
How to Unassociate a File Extension Type in Vista and a utility to help (Windows 7 too)
http://www.vistax64.com/tutorials/91920-unassociate-file-extention-type.html
How to Set Default Associations for a Program in Windows 7
http://www.sevenforums.com/tutorials/2630-default-programs-set-programs-default-associations.html
How to Change the Default Program a File Type Opens With in Windows 7 http://www.sevenforums.com/tutorials/12196-open-change-default-program.html
How to Associate a File Type or Protocol Default Program in Window 7
http://www.sevenforums.com/tutorials/9154-default-programs-associate-file-type-protocol.htmlhttp://www.vistax64.com/tutorials/69758-default-programs.html
How to Hide or Show Known File Type Extensions in Windows 7
http://www.sevenforums.com/tutorials/10570-file-extensions-hide-show.html#post101629
Hope this helps.
Rob Brown - Microsoft MVP <- profile - Windows Expert - Consumer : Bicycle - Mark Twain said it right.