Thank you for your post, Rp.
I reviewed the registration details and can confirm that you have a registered copy of Photoshop Elements 10 with one activation remaining.
Photoshop Elements 10 is a much older version and was not designed or tested for Windows 11. As a result, installation issues can occur even when the serial number and activation status are valid.
As a first step, please try running the installer as an administrator and, if available, using Windows Compatibility Mode for an older version of Windows.
You may also find the following resources helpful:
If you receive a specific error message during installation, please share a screenshot or the exact wording of the error. That will help us better understand where the installation is failing.
Please do not post your serial number or other personal information in this public discussion, Rp.
We look forward to your update to this discussion thread. ^JW