User Account Control problem

[Mjp1050]

Whenever I try to launch KSP this shows up:

This doesn't prevent me from playing the game, it's just annoying. How do I get rid of this?

[qzgy]

I'm not sure. I would just launch directly through the application, and I don't have that message.

[steve_v]

On 9/07/2017 at 3:52 PM, Mjp1050 said:

How do I get rid of this?

Use a less annoying operating system. I recommend a UNIX derivative.

That message is Windows UAC (User Aggravation Controller) warning you that (shock and horror) KSP is trying to write to the hard disk. Why it sees this rather mundane activity as a problem is a question to ask Microsoft.
My guess is that it's getting excited because a) you're running KSP as administrator, or b) KSP is installed in a "system" directory (e.g. Program Files).
If KSP is in a system directory, moving it somewhere else might be a good idea. I think the desktop is probably safe, but you never know with this thing. UAC is fickle and easily riled.
Alternatively, you can kill UAC popups permanently from the Windows control panel, under "User Accounts". Do so only if you understand the implications.