On Tuesday, 3 March 2020 17:55:43 UTC, wrote:
I have asked to look at the above, which sort of runs, but in treacle
mode. Takes forever to boot up, press a button and it will maybe
respond 5 minutes later.

It has Win10 installed on it, it seems to have a reasonable spec. I'm
wondering if there should be a recovery CD for it, or if anyone knows
where I could download from and burn a CD?

Have the Lenovo drivers, etc., been installed? Probably needs Lenovo Vantage installed to do that properly. The process of finding and installing updates usually works fine. It can make a huge difference.