Hi Maybe it is a really stupid question, but I have Acer aspire one 531h with preinstalled XP and I want to upgrade to Vista. There was one CD in the package, named CD recovery and three DVDs - Vista upgrade in differrent languages. And I really dont know how tu use them. Recovery CD only reinstalls XP on the hardrive (It does the same thing as pressing Alt-F10 during boot sequence). There was no visible posibility to swith to Vista. On DVD are several directories, the biggest one contains many files with SWM extensions named POP0105M02CS5C01.SWM etc.. DVD is NOT bootable, it contains no executables so I really dont know how to use it. I was googling long long time, I was searching this forum and I only know that swm is file format used by Microsoft's program imagex. And thats all :( Please, if You know what to do, give me some clue. P.S.: Sorry for my poor english...