Hi Scratchy, and welcome to SevenForums.
The process is quite simple:
Shortcut Extension - Remove or Restore
1. Open the Registry Editor. Click the Start button, type regedit, and press Enter.
2. If a User Account Control dialog box appears, click "Yes".
3. Navigate to the following key: HKEY_CURRENT_USER \ Software \ Microsoft \ Windows \ CurrentVersion \ Explorer
4. Double-click the name "link", changing its value to 00 00 00 00.