Windows – Can I install windows 10 in windows 8 laptop using the same product key

product-keywindows 10windows 8windows-10-upgradewindows-installation

I have laptop that come with windows 8 installed and I install windows 10 on the same hard drive (in new partition) using same product key.

I want to keep windows 8 and don't want to use windows 10 right now but I install it to get free upgrade before 29/07/2016 (the last day for free upgrade)

my question is : is that ok or my product key will be blocked.

NOTE:

  • Now both windows are activated
  • Original windows 8 is Single Language OEM
  • I install windows 10 using bootable flash drive that I made it by Media Creation Tool downloaded from Microsoft site.

Best Answer

If you use the free upgrade system (via Windows Update, Media Creation Tool or standalone installation media), Windows 10 will overwrite your Windows 8. It is the purpose of an upgrade: it replaces what already exists with something newer.

However, you will still be allowed to install and activate Windows 10 with a Windows 8 key. However, you won't be legally permitted to have both Windows 8 and 10 installed (even if they are not used) with the same key at the same time. And IIRC, you are not even allowed to permform a clean install with an OEM key.

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