I’ve done two Win8.1 machines and I am waiting on my Win 7 machine to get notice. The Win 7 was a Vista Basic computer when new. I moved it up to Vista Premium, then 64bit Win 7.
Should be ok.
People talk bad about Vista, but, I never had an issue with it, nor have I had one with 8.1. It worked and worked well on my machines.
The main thing is to look at the suggested requirements, not, the minimum requirements, to see if your system can handle it.
You can bypass the ‘notice’ and go straight to the MS webpage to download the 32-bit or 64-bit installation part. It is about 18Mb.
https://www.microsoft.com/en-gb/software-download/windows10