Hi Pete
Thanks for the system information. Unfortunately, now I have checked online, it cannot be updated to Windows. The two reasons are the CPU is Incompatible; you have an Intel Core i3-3240. Microsoft's Requirement: 8th Generation Intel Core or newer.
TPM Version is Likely Insufficient, the Microsoft's Requirement: TPM 2.0 & Secure Boot Enabled. So, both are showstoppers.
In your case you can an unofficial workarounds to bypass the CPU and TPM checks. However, I would strongly advise against this because:
It involves modifying system files or the Windows installer.
It can be unstable and may not receive future updates.
If something goes wrong, it can be difficult to troubleshoot.
One cost effective way would be to think about a refurbished model that is 3-4 years old) would easily meet the Windows 11 requirements and provide a significant performance and efficiency boost. Look for a model with an 8th Gen Intel i3 or i5 (e.g., i5-8500) or newer.
There are some Linux options but there is also the associated learning curve with them