Windows Upgrade Help and more

Same here. This happened to me with an older Office version. The end-of-support notice meant security updates stopped, so I had to plan an upgrade.

Yeah, the i3-6100 is a hard cutoff, so that workaround is pretty much your only option if you want to force it.

This. You could also check if a TPM 2.0 module is available for your motherboard as a physical upgrade. Another option is to stick with Windows 10, which is supported until late 2025.