@eniko If for some reason you want to upgrade to 11 despite Microsoft claiming your computer doesn't support it, there are two ways:

• if the only thing you're missing is new enough CPU (but you have TPM and Secure Boot), set HKLM\SYSTEM\Setup\MoSetup → AllowUpgradesWithUnsupportedTPMOrCPU=dword:1 and the Setup will run (it'll show a warning, but let you continue)
• if you don't have TPM and/or Secure Boot, run setup.exe /product server, and it'll ignore everything

OTOH, as long as you pretend to be in EU, you can register to receive security updates for Windows 10 for free until October. Or you can use the scripts from massgrave.dev to activate ESU.