I use windows xp. Upstairs my computer in my bedroom has service pack 2. A file went missing and it tells me I need to reinstall it. Because of this missing file my computer resets itself at regular intervals of say, about seven minutes - thus making it virtually impossible to get into Windows long enough to do anything. So I finally loaded it up and put the XP CD in, couldn't find the file it wanted and decided just to back my files up as it miraculously stayed on for an hour, and then reinstall Windows. But it wouldn't let me because my version of Windows XP on CD is older than the one on the pc, and I can't find the Service Pack CD to sort the whole mess out. So now I can't use my upstairs computer. At this moment in time I don't like WIndows.