Here’s the only things I do that necessitate a Windows Machine
1. Reaper - Multitrack recording software
2. Ulead Photo Impact - Win98-era pixel editor software
3. MS PowerPoint - presentation software
But note - none of those necessitate network connectivity.
And each task is a seperate work station
Hence these Windows machines almost never see the internet - and thus, keep working!
Have you tried running these as VMs? Seems like a logical solution. That way, the instances will outlast your hardware.