What you are suggesting is called a Dual Boot computer where you have a choice of booting into one OS or another after switching on. I tried running Win Vista and Win XP on the same PC (on separate hard disks) but it was like having the neighbours from hell living next door to one another. So I had to split them up and buy a second PC and now everything is peaceful. Just something you need to be aware of especially when trying to get a Windows operating system to work with something else.

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