Application icons and extension changed to .LNK

 Application icons and extension changed to .LNK

1.            Click run command then type regedit and press ENTER.

2.            Navigate to the following registry branch: 

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\[ext]

Replace the [ext] with the actual file extension that you want to restore its file type association to revert back to original Windows 7 default (probably .lnk).

If you unsure, simply browse through all the sub-key under File Extensions.

3.            Delete the sub-key named UserChoice.

4.            Exit from Registry Editor.

5.            Restart the system