Can I not have two WinXP Pro OSs (on separate HDs) attached to one motherboard?

I'm putting together a second computer made from old spare parts. All the hardware works fine. I installed WinXP Pro and it booted to windows with no problems. I then put this old HD into my new computer as the primary slave (I changed the jumper pins accordingly) and then copied over some files from my new comp HD to the old. My new comp is an Asus P4P533MX board and the old one is an AMD SiS chipset. The problem is, when I put the old HD back into the old comp (SiS chipset board) the comp hung at the windows load up screen. I rebooted, same again. The third time I rebooted it didn't even get to Windows load up screen.

Can I not have two WinXP Pro OSs (on separate HDs) attached to one motherboard?

Many thanks,
btgmanAsked:
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hujiConnect With a Mentor Commented:
Yes you can. But remember: When you attatched the new hard disk and compied some files to it, you should not copy files to the active partition, without being sure that this does not harm your OS.
huji
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andrewjbCommented:
What sort of flies did you copy? Were you trying to update windows stuff?
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Origin42Connect With a Mentor Commented:
To multi-boot your computer you have to follow some set rules.

Heres an official microsoft page with information on how to multiboot diffrent MS OS's:

http://www.microsoft.com/windows2000/techinfo/administration/management/mltiboot.asp

Also Windows XP is very much tied into the hardware of the system you install it onto so you have to make sure the installation is on the machine you want it installed on and that the files you copied accross wern't system files from your newer machine.
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Origin42Commented:
I forgot to paste some of the other good information about mulitbooting:

http://windows.about.com/cs/dualboot/

I hope this helps.

:)
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hujiCommented:
May it be 40 to me and 45 to Origin42 ...
huji
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