Click your Start Button, type regedit and hit Enter to open the Registry Editor.
Click View and make sure 'Address Bar' is turned on.
Paste this into the Address Bar at the top and hit Enter.
HKEY_CURRENT_USER\Control Panel\Accessibility\StickyKeys
In the right hand pane, double click the Flags entry, set its Value Data to 506 and click OK.
Close the Registry Editor and restart (not shut down) your PC to apply the change.