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How to reinstall Windows 10 on a laptop that was originally Windows 7
About 2 years ago, I bought a Windows 7 laptop from Costco and when Windows 10b came out, the laptop had the required specifications to upgrade to Windows 10 for free which I did.
Last night, the laptop had a virus and so I used the restore to default settings to bring the laptop back to the Windows 10 base settings, but 75% of the way through the process, it failed and the laptop now gets "no operating system found".
What I'm wondering is:
1. Is there any way for me to install Windows 10 on this laptop by downloading a trial version of the OS from Microsoft and then registering it. I never had a serial number for WIndows 10. When I bought my PC from Costco, it came with a legitimate Win 7 license and then I was prompted for a free upgrade to Windows 10.
2. Option 1 is preferred, but if it is unavailable, is it possible for me to get the install disks from Costco to reinstall Windows 7 on the PC and then somehow upgrade it back to Windows 10?
Thank you for your time.