hi, I want to builder a new pc. when I get ready to boot it up can I use a hard drive with XP on it? or do I need to use a new hard drive. What opt do I have to load XP on it with out buying XP.
If you don't have a CD, then you need to hope that your existing install will work (it will need a product key change, which you can do over the phone for free). If the old install isn't compatible though, you either need to buy XP, or resort to less-than-legal methods of acquiring it.
It probably won't boot if the IDE drivers isn't compatible. If a proprietary IDE driver was used on the existing build, it won't complete boot unless the chipset on the new mobo is identical/compatible with the one that the XP load was built on. Then you will have the product key change challenges.