Error 0x80000003

[CarpeDiem]

Could you elaborate a little more when and how the crashing occurs?

First of all do you have any mods/addons installed on gmod? If so, get rid of them by unsubscribing and uninstalling them on gmod's main menu or steam workshop and then go in gmod's addons folder and make sure the addons are gone (if not, delete manually). You could also try (re)subscribing to the community's addons on steam workshop.

The issue you're having can be caused by numerous reasons, but we can start trying to fix it by updating your graphics card drivers since they seem to be last year's edition.
Download the crimson beta drivers from the bottom of this site. I recommend you to delete the old ones completely before proceeding with the update.

There's also a hotfix from microsoft to the issue which you can download here if it hasn't automatically been applied to your computer.

Although this could be caused by a registry related issue which you can try to get rid of by using a registry fixer program of sorts.
Try ccleaner's registry issue fix feature

Spoiler :

[Image: db1643b0ae594e9d870f1a6e1cf03c8b.png]

If all else fails, reinstall the game by also deleting the whole game's folder manually after having used steam's uninstall feature.

Ill try to update the driver with that site, But ive deleted my gmod long ago and ive unsubscribed and all that so that didnt work, But ill try the driver now.

It crashes in 1 minute - 30 minutes, It usually doesnt last longer than 30 minutes and mostly at 10 minutes.