Just need to check a couple of things:
Are you attempting to run SC from within the zip file or did you unpack it to a new folder?
Do you have .NET Framework installed, if so which version?
Please state your operating system.
Please check if your system install/enable .net3.5 framework.
looks like it's showing as 7zip
I'm on a PC
and no I don't have .NET installed
Looks like a 7zip folder
I'm on a PC
no I don't have .NET installed