Hi Rig Lx,
Since AI answer already covers the checking steps, so you can follow to proceed. Additionally, could you please share:
- The activation error code/message shown under Settings > System > Activation.
- How you purchased the Pro upgrade, for example through the Microsoft Store or another retailer.
Please don't post your product key or other sensitive information. With the exact error code, we can narrow down whether this is a licensing/account issue or something else without repeating the steps you've already been given.
I hope this helps point us in the right direction.