Nuendo 7 worked fine on Win 7 but real problems installing on Win 10 64-bit ver 20H2

I’ve tried to reinstall using the iso images at Steinberg and it hangs, won’t update, doesn’t even ask for iso 2 or recognize the vst sound library which is the majority of iso two. Any suggestions would be greatly appreciated as the program worked fine on Win7. Steinberg support is extremely limited. Searched archives and have tried almost everything.