For those who still need to run Windows, I recommend that you utilize the Windows 10 LTSC IoT iso (can be found online; make sure you verify it with a checksum from microsoft) as it will receive security updates until 2032. You can debloat the iso significantly using this guide, though be warned that it is very easy to break and you may need to re-modify and re-install it to fix any weird errors that you introduce. Mine works great, totally removed defender, all telemetry I could find, etc, but my BitLocker doesn’t work lol.

If you need help give me a shout. I wont share an ISO because tbh you shouldn’t trust a stranger for that, but if you have questions I’ve done this about 12 times for myself and others