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Windows 10 upgrade crashed my computer. IOS is gone.
After upgrading from Windows 7 Home Premium (64 bit), to Windows 10, my computer crashed. There appears to be no IOS at all. My start button doesn't work. I tried alternative suggestions for system recovery when the start button doesn't work. NOTHING works. I don't have Windows 7 disks because it came on my computer when I purchased it. How can I reinstall Windows 7? When I could still go online (but just couldn't open any files or programs), I tried to download it from Microsoft, but when I entered the registration key from my computer, it wouldn't work because it was factory installed. I have already bought a new computer, and the store transferred my files to the new one, so I'm not concerned about saving files or programs. I just want to have my old computer working again with Windows 7 Home Premium or Windows 10. Please help (in layman's terms, as I am not very computer savvy)! Thank you.