Windows won't start after motherboard install.

So I recently replaced my motherboard and transferred everything else from my PC into a new case. The PC started up fine, loaded for about 10 seconds until it got to he windows load/startup screen. It then crashes to a blue screen and the cycle starts.

I get a message saying how I need the windows installation CD so I can do a startup repair to resolve the problem, although I do not have the CD as I purchased the PC from HP.

I already did a system restore and that did not work. I read online how Windows 7 has some problems with motherboard compatibility issues with motherboard changes. Everything would be ok if I just had a CD handy. I don't want to go and purchases the whole thing of Windows 7 just to recover my PC.

I'll see if I can record a video of exactly what happens and put it on here if more info is needed.

Does anyone have an suggestions on what could be done?

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Clarification Request
Oh boy...

Two strikes against you, that's HP and new mtrbd.. What that means, if the new mtrbd. wasn't an HP one then expect as Robert offered a "tattoo issue" this is strictly a HP item. Doesn't matter if HP mtrbd. or non-HP the recovery s/w looks for that. Plus, the tattoo is something HP does to control restrictions they impose. If non-HP mtrbd. then the recovery s/w sees a big difference and then Win 7 own restrictions kick-in on top of HP ones, as in ie: OEM version of windoze. If this is a HP supplied or eBay type purchase, you need the tattoo routine done either by HP or authorized repair center. As far as I know tattoo s/w is NOT released to end -users. HP does ell the recovery OS discs and they are for small cost, less than retail versions, provided all is HP h/w. You can check at the HP forums via the HP support website and query there as well.

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Bad news. Where to start?

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