Gmod validating with every launch

Ok I don’t understand it, but every time I launch or try to launch Gmod it tries to validate the files.

Why is it doing this and how can it be stopped?

Let it finish validating. Does it do it again even after validation? Does it crash after it finishes?

It’s with almost every launch. It’s really once per steam boot up but it’s still way too often.

Try validating your cache Manually instead of letting steam do it automatically, If that doesn’t work then you might need to go about re-downloading G-Mod to make sure your GCF isn’t corrupted.