I recently bought a new desktop that came with Windows 7 Pro. After upgrading to Windows 10 and installing an SSD by partitioning the hard drive and making an image of the most important part, I have been using it for a few weeks with no trouble.

However, I just installed a GPU, and there were initially some troubles as I installed it, including the Blue Screen Of Death. After checking the Stop Code and finding instructions on this website to fix it by performing a check on the drive, I was able to make it work again, but since then the lower right corner of my screen has looked like

Watermark telling me to activate Windows

I checked Settings, and it said that I have error code 0xC004f034. I clicked the option to check my computer for a license, and the option that I had changed hardware recently, and it confirmed that I had a license for Windows 10 Pro on this machine that was running Windows 10 Pro... and said that I should now install Windows 10 Pro.

At first it looked like I could sidestep reinstalling everything if I just signed in to a Microsoft-affiliated account such as Skype, but I stopped pursuing that option when it became clear that I would then have a Microsoft account connected with this computer, and that my computer account password would be changed to that Microsoft password.

So, I'm now wondering if I can fix this problem of a watermark that tells me to activate Windows without being coerced to put a Microsoft account into Windows, spending money or reinstalling Windows.

Some specs about the Windows I have installed are:

Windows version specifications

As suggested, I ran ShowKeyPlus, and it shows an installed key as well as an original key.

  • You will have to activate your installation by calling the MS activation center for your region phone – Ramhound Dec 17 '17 at 1:50
  • Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. The entire paragraph about SuperUser is extremely confusing. – Ramhound Dec 17 '17 at 1:51
  • Some of the information that isn’t required to answer this question. A screenshot that indicates you actually currently have Windows 10 Professional installed, which build of Windows 10 you have installed, written confirmation that ShowKeyPlus displays your Windows 7 license key. – Ramhound Dec 17 '17 at 1:59
  • @Ramhound "Some of the information that isn't required to answer this question" - what do you mean by that? Grammatically, I'd guess that you were about to list things I mentioned which were superfluous, but what you list are things I haven't mentioned. I'll look for the things you listed. – Post169 Dec 17 '17 at 2:48
  • I was listening what I needed to know to answer this question but wrote isn’t instead of is which is sort of obvious in the context of the second comment I made. Did you try an activate your installation by phone? – Ramhound Dec 17 '17 at 5:07

From an elevated command prompt run the command: slmgr /upk

This will remove the product key from the system and allow you to enter a new product key.

Proceed to the activate windows screen again, and enter the Windows 7 product key from the original license you had. This should be located on an OEM sticker on the computer or with the the installation media you purchased.

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