TY for the help so far Animal

Went to add/remove progs and clicked change. Told me to install cd then gave a repair option. Clicked repair...restarted...got back online and tried to update....nope. I got a window up that said;
[font=Comic Sans Ms][i]The update service agent failed to install properly. In order for
the update agent to properly install you must be adminstrator( i am ) and you must be using your brower default settings. press ok and try again to show updates through usa or cancel to connect without usa. If
you close to proceed without agent you will not be able to see some updates.
[font=Arial Black] There is also a active x install bar below the browser bar (information bar?) where right click and click install is available. No matter what I do at this point I still get this:
Incorrect product GUID pattern error. Incoming product GUID=unset
Same as before. Should I just re-install/install instead of repair and try again?