1. Click Start and choose Run...,
2. In Run window type regedit,
3. Go to: HKEY_CURRENT_USER \ Software \ Microsoft \ Windows \ CurrentVersion \ Policies \ Explorer
and
HKEY_LOCAL_MACHINE \ Software \ Microsoft \ Windows \ CurrentVersion \ Policies \ Explorer
4. In bouth of them find next item NoViewContextMenu and give her a Value 0 to turn-off right mouse click or 1 to turn-on, if this Value don't exist create new DWORD with same Values,
5. Restart your computer.
