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HP Recommended
compaq 8200
Microsoft Windows 7 (64-bit)

iI was upgadeing from win 7 to win 10 .in the middle i had to restart,dont know why,when it came back on,i had a screen come up that said ,i had to reinstall a couple file and need to insert that os disk.recoverywas worthlees because ,window did not get through the start up.i could get in to the cmos and again ,usb flash drives or disk of recovery were not exceted im lost.i dont have oem disk to reinstall .i have one window 10 and one windows 10 oem ,suppose to be oem ,none work                                                               do i format the hard drive and install window 10 that way .im lost they need window xp 64 back ,could fix anything with that,within reason.      thank for your time and input 

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