I've just installed Vista Ultimate. It worked all right for a couple of days. Now, suddenly, after I log in, I get the error message: Wuauclt.exe has stopped working. There are two options; the first offers to solve the problem via the internet, while the second just says to close down the program. I've tried Safe Mode, which works OK. The file in question seems to be in the proper place, but I'm wondering if could have been corrupted. The install DVD also offers to solve booting problems, but doesn't have any effect. Perhaps re-installing Vista is the answer, but how do I go about that? Any help will be greatly appreciated.