Windows 10: Bought a cheap pro key from ebay that i really regret, and now i can't upgrade my win 10...

I was stupid and tried to buy a cheap win 10 pro key from ebay, it didn't work at first and then seller sent 6 new keys, and one worked. But I regret that so bad and want to instead use my legit store purchased full dvd of home, then upgrade to legit pro. But won't let me. As the pro was installed on my new bigger ssd, and still got old 10 home windows on a smaller ssd, I wanted to upgrade from the old,but now it just says install pro, and not upgrade for xx money. How can i undo the 10 pro key and properly upgrade my other legit one?

:)

 

Win 10 Pro upgrade using Win 8 Pro product key

I just bought a new computer running Win 10 Home. When I went to upgrade to Win 10 Pro using my Win 8 Pro product key from my old computer, the upgrade wouldn't activate.

Now I'm stuck with a bunch of error messages (mainly 0xC004C003) and am being told windows isn't activated. I can't seem to get my activated Win 10 Home back.

I don't have a product key for the Win 10 Home because it came pre-installed. There's no product code recorded on the packaging or labelling on the device.

So:

How do I either

• activate the Win Pro upgrade, or
• Get my activated Win 10 home back?

 

Trying to upgrade to Win 10 Pro

I have Win 10 Home on my Lenovo laptop. I bought a Win 10 Pro For OEM software pack to upgrade to Win 10 Pro but my system didn’t accept the 25 character prod key. What should I do?

I’m trying to install the upgrade via DVD (which came with the pack) but I noticed it said during the process that it would install Win 10 Home on my laptop but I already have that. Any suggestions ?

 

How do I get the key for win 10 pro?

Hi,

I upgraded from win 10 home edition to win 10 pro. I had to reformat my computer with the factory image restore. It installed the win 10 but I did not have key to upgrade to pro. I have the following information from my Microsoft account. How do I get the
key for win 10 pro?

Here is my computer info where the win 10 pro got upgraded.

• DESKTOP-JP9JK4V
• Dell Inc. XPS 8900
  • Serial #: 3R8F082

Thanks!

Syed Ahsan