With the copy of XP SP2 I've got, I used to get updates from Microsoft with no problem, but in the last week, I've been getting the little yellow shield (Updates are available for your computer. Click here to download). When I click, sometimes it starts downloading, sometimes it doesn't. When I shut down the computer I get a message on screen that updates are being installed, Windows will shut down when they've finished, and it says something like Installing 1 of 91. Then my machine shuts down obviously before the updates have been installed, so the next time I boot I get the same thing all over again.

Solutions? (Other than buy a real copy of XP2 )