I have been running Rhino 4 for years and I have just downloaded the Rhino 6 Evaluation to try.
On my Dell Inspiron 7573 laptop (Intel i7-8550 with 12G RAM with Win10-64bit) the install appears to run to completion and it reports a successful install but when I try to run Rhino 6 nothing happens. Neither Normal or Safe mode works.
When I look at the registry, under HKEY_CURRENT_USER/Software/McNeel/Rhinoceros/6.0, the only subfolder I see is the Install one.
On my desktop where it did install correctly I see a number f other sub-folders below the 6.0 entry.
Mcneel support suggested it was an old display driver and sent me a link to update it, but it had no effect and have given up and can’t offer any further suggestions.
Unless anyone has anymore suggestions I guess I’m stuck with Rhino 4 on my laptop.