Windows 10: Usage of existing Laptop Windows Pro key in new laptop

I have brought new laptop with windows home version as my old one laptop is having issue. Now I want to use existing windows pro key to activate and update the same in new laptop.I have upgraded my home version to pro using microsoft online.Kindly support

:)

 

W7 Pro Laptop

eh, not sure this is where to ask. if you want to buy one, post in the WTB section of the forum?


any laptop with more than 1GB of ram will run windows 7, i'd suggest a core 2 duo with 2GB.

 

Best laptop under $800??

Well the last one I suggested seems to be the best for 650$

EDIT: to facilitate your search...

Laptop GFX benchmark list

Laptop CPU Benchmark list

 

Windows 10 Pro product key on old laptop not working on new laptop

In 2015, I upgraded my old laptop from Windows 8.1 Pro to Windows 10 Pro via the free upgrade that Microsoft provided. My old laptop had an OEM 8.1 Pro key, and thus the 10 Pro key was a genuine product key, direct from Microsoft.

Fast forward to the day this post is made; I have a newer and much more powerful laptop than my old one. I decided to take the 10 Pro product key from my old laptop and use it on my new one (the new one had an OEM Windows 10 Home key). I deactivated the 10 Pro key on my old laptop and upgraded my new laptop from 10 Home to 10 Pro. However, I cannot get that key to activate 10 Pro on my new laptop.

It is important to note that I do not have my old installation of Windows 8.1 Pro on my old laptop as I deleted it years ago to increase the space on my hard drive.

I contacted Microsoft support to help me activate the key but to no avail. When I gave them my 10 Pro product key, they said it was invalid and not genuine. They also added that I should contact my vendor for a new key. In my case, wouldn't that vendor be Microsoft themselves?

The error code I am getting is 0xC004C003.

Can someone please help me resolve this issue?