Hello. I will need to buy a version of Windows XP. I was just wondering, is there any advantages in getting a non-oem version from a oem version? I personally don't need the manual and support as long as I have a working version of windows xp I am fine. My dad spoke to a guy, and he said that oem version are bound to one piece of hardware. Is this true? Also, can you upgrade to a later version of windows using a oem-version? Is an upgrade from to an operating system cheaper than buying a new oem-version? Thank you.