I'm working on a friend's computer, its a Dell Dimension 5150, along with that they never gave them a OS disk or recovery disk, so I'm sitting here with my thumb up you know where on what to do. My friend has a key and license for his copy of Windows, I need to reformat and reinstall, I need a to know what I need to do exactly to create a disk that won't (when I go to activate within Windows) tell me the key is invalid or some such technical difficulty. I have two supposedly dell oem home versions of windows xp sp2 and sp3. I'm hoping that the they will work but I just need to know that they will work or what I need to do to get them to work without running in to activation or key issues once the operating system is installed. I also have a few windows pro sp2 vlk copies that all have legitimate keys but I'm not sure those will work either. He has a legitimate key of windows and a coa sticker, we just don't have the disk to format and reinstall windows, and I'm worried about him not having a activated copy of windows until Dell can send a disk. My primar y question what can I do to ensure he has a activated copy of windows with his key? I'm sorry if this sounds like desperation and I'm probably exaggerating the problem too, but I just want this to work and I'm not entirely familar with creating a pre-activated install disk. Many thanks for any replies, I'm sorry if this has been answered/posted before as well.