Standard and Enhanced keyboard driver is built in to Windows (Microsoft generic PS/2 or USB driver for any brand of keyboard).
However, the SK 6000 is very old so it's very likely not supported on Windows 7 or later.
Easiest thing to do is to buy a modern keyboard - - I've never had to install a third-party driver for a keyboard - - not ever.
Don't use the link in the previous post, it's not a driver. It downloads software called "Driver Robot" which you have to pay for.
Then it searches the web for drivers for your system. It could also contain malware as the previous poster warned you about.