Windows 11 deactivated after 24h2 update

Yep. I can imagine what businesses and IT people who may be working with dozens or hundreds of Windows systems must be going through. It's crazy that this hasn't been fixed yet.

I agree. Unfortunately for me, I didn't notice it was deactivated until it was too late to roll back. I haven't had the time to call Microsoft to see if some how we I can get my product key. At this point I am positive my product key was thrown out during our move.

We are now in April 2025, six months after the start of this thread, and this issue still exists. I have an ASUS TUF gaming PC built by Arsenal PC. It came with an OEM version of Windows 11 Home already installed and activated; I do not have and cannot find any activation key on it, only five digits at the end of the license number. Whenever my computer tries to update to 24H2, it deactivates the license and I have to roll back to 23H2. I have tried all the solutions suggested here and elsewhere. The fact that this problem still exists after this long is ridiculous.

I have an issue where I have moved from an old PC that had a Windows 10 Home key.. I have tried using it on my new PC but it's no longer activated.

It accepted the key when I installed the OS (Win 10) and then I carried out an update to Windows 11.. and now it's no longer activated.

I also had a key from another HP machine that I am now selling but it won't accept that either...

I'm having a similar issue. I have a Windows 11 Proessional edition of Windows, and it was previously activated and working fine under 23H2. However, every time I try to do the upgrade to 24H2, I get a notification that WIndows is not activated, and the product key I had previously used for 23H2 does not seem to work properly. Therefore, I have reverted back to 23H2 every time, but that's only a temporary solution. I would like to know how to resolve this for good so I don't keep getting prompted to update to 24H2.