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I have external hard drive with some data (movies, music, apps, etc.) and I am wondering whether I can use it as bootable HDD to install windows from it, I have installer on my second PC and I am not sure if the fact I have other data on this external HDD may cause any problem when installing Windows using it? I am trying to install one of the following: Windows 7 Ultimate Windows XP Professional
preferably the solution(s) should apply to both, because not yet decided which one I will use.
Thanks in advance for any help :)