I just got a dell desktop =P so I now understand why that dock is so awesome lol.
The dock has an autohide feature. Make sure that feature isn't turned on.
Besides that, you can run the dock from the start menu. If it doesn't run from there, right click and run as administrator.
The worse case senario, create another user account. If the issue deals with a user profile error, that would be reset.
Cheers~!