Help! Recently downloaded XP SP2 and am having serious problems with my computer. I am unable to use my 'search', 'help and support' or 'system restore' functions. Clicking on these just brings up an empty window. I've uninstalled SP2 but still have these problems. I also now get an error message when I try playing music on Windows Media Player. I've removed it and reloaded the latest version, getting the same message.