I successfully started nanoVNA-Saver when I installed the SP1 service pack and Ms VC ++ multipack on windows7-32 bit.
When I tried to install Python on a machine that didn't have it, but I didn't know it because it was missing a piece of Ms VC ++.
In my opinion, if your basic operating system is OK, you can install MS VC ++ (multipack 2005-2017) on it without error, and the nanoVNA-Saver that uses a lot of graphics will work.
Without him, not even Python.
73, Gyula HA3HZ