former raid drive will not boot in a new hardware environment

I had a failing motherboard. The two drives were originally set to RAID 1 (Via Promise) but had degraded some years ago...the RAID array was removed...and the drives continued to function as separate entities. One boot the other merely storage.  I cloned the boot drive and installed a new (different) motherboard. If I attempt to do a repair install of Windows XP, windows does not see the old OS. I wanted to do a repair of Win XP Pro>Vista Business upgrade>Win 7 Pro upgrade...the reason being that there are many programs installed that I don't want to have to reinstall all. If I try to boot to the hard drive , I get "NTLDR is missing".
I have tried fixboot, fixmbr but no joy.
Any suggestions? Thanks
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Use Paragon's free rescue kit to try to fix this. Also make sure you have the HD controller's drivers available when you try repairing things.

Be aware that if you had an OEM version of windows installed originally, none of this will work as you will have activation and license problems since this is a different mainboard.
Many RAID controllers have metadata that starts at physical block #0.  If yours is one of them then the O/S is there, just not at the beginning of the disk.

Software such as 's RAID reconstructor can find the metadata and let you image the HDD onto another and strip off the metadata.
noxchoGlobal Support CoordinatorCommented:

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