Windows 10 oem re-use after fault?

[Scania]

My dads old rig has expired, 99% sure the board has failed, anyway, I want to give him my old i7 870 rig which currently has 10 retail on it (upgraded from 7 retail) - this copy I intend to use with my new build - his pc being ancient has windows 10 but it's 32bit and I'm 99% sure an oem I bought from OC/UK around the time XP support ended, hence me upgrading dads pc in the first place and why I got a 32bit variant.

My question is will Microsoft allow the reuse of his oem key given his old machine is dead and if so can I use a 64bit install that I've already downloaded to a USB stick with a 32bit key?

The alternative plan is a second hand copy of 10 or 7 from the MM or eBay but I'm reluctant to do this if I can reuse his existing key.

Cheers.

 

[Threepwood]

I think you will be fine. I recently upgraded a friends system (he has free win 10) and the only thing that was kept was the hard drive and the psu. There was no problem at all, I was amazed.

The night before we did create a microst account and verified the computer... looking for link brb.

> https://support.microsoft.com/en-gb/help/20530/windows-10-reactivating-after-hardware-change <

Then, after doing seeing if it works with no faff, I think you can upgrade to 64bit win 10 for free, with free win 10... but with a full reinstall from win 10 x64 media upgrading.. to x64 but without losing your free win 10, the machine remembers.

 

[Scania]

Just to clarify, I have 10 retail (upgraded from 7 retail last year) my dads pc is a purchased physical copy of 10 32bit but an oem as I built the original machine myself for him many moons back...

I've been advised that my copy should indeed be fine with my new build given it originated from a retail copy of 7, I'm just a bit worried dads oem copy will be tied to his now dead pc....