Yes, I have a lot software which takes a lot of time reinstall. About 1,5 TB. I made a Windows 10 SSD boot disk for KiCad. But if W7 works, why fix it. XP is a nice operating system, perhaps better than W7 or W10, but it does not understand large Hard disks or Ram.
That is, this machine can boot into W10 or W7 and I want to have NanoVNa on both.