I have Windows XP with SP2. I noticed that my Windows Media Player had blocked out the back and forward buttons ( I couldnt use them) then I also noticed that Msn Messenger wouldnt display the song I was listening to (Yes I had it clicked on). So I decided to do a Windows Update to see if that would fix it. I click on download to install the 'Windows Genuine Advantage' update, then it says intallation failed. So I went to review installed updates. I clicked on the red X and nothing happens.