Press Win+R
Then type regedit
Go to the following Key
HKEY_CLASSES_ROOT\Lnkfile
On the right hand pane - Can you see a value IsShortcut
If not..(if this entry is missing)
In right-side pane, right-click in empty area and select New -> String Value option. Now set its name to IsShortcut
(No value needs to be entered)
Restart computer.