I received an interesting question today from someone who had an empty Performance Information and Tools window.

At first I wondered if it was related to a change in hardware. I had a look on my notebook and saw that the update link had moved to the top because the Vista Performance Rating had not been updated since I upgraded the memory in my notebook.

What I hadn't realised until I was sent a screen grab was that there was nothing in the window apart from the 'Not sure where to start' link. And that didn't work either. It helps to have a sense of humour at these moments.

There is a solution to be found at Winhelponlin.com. This does involve editing the Registry so make sure you have made a System Restore point before starting. A proper backup won't hurt either.