Brummie a long time ago
master brummie
I have a gut feeling that linux is not your route to peace and tranquility. W10 support ends October 14th. However, read this link to see how to extend it to October 2026. It is a bit alarmist, but does give you the steps to take.All very interesting......

Here's how you can extend Windows 10 support for free before end-of-life in a few clicks
Windows 10's official support will end soon, on October 14, but here's how you can extend it for free in a few clicks in Windows settings.

I haven't verified those instructions.
Then you perhaps need to suss out using your currently vacant D: drive.
Andrew.