I had upgraded Windows 7 Ultimate to Windows 10 about 7-8 months back. Yesterday, Windows 10 threw a Device_Power_State_Failure and gave the BSOD. I rebooted the computer (desktop) and have been having issues since.
Opened the hardware and gave it a thorough cleaning. Windows 10 is no longer available. The OS options at startup show me Windows XP (installed on separate hard disk) and Windows 7 as the two options. Windows claims that it is not a genuine copy. No programs are working, including control panel, help & support etc. No idea where to enter the Windows 7 code and start to recover the Windows 10.
Any help is appreciated. Thanks in advance