Abyone know why the welcome centre does not load?

[Knappster]

Been happening for a while now but when you click on the welcome centre on
vista a box opens and just closes again. I have sp1 installed but no joy. any
advice?

 

[Knappster]

Thanks for the advice guys.... but problem is i cant access the cmd prompt.
when i right click it to run as admin it closes and refreshes my screen...
also removing some icons from the toolbar. really strange! any ideas...