When I open up Fortnite and then close it my pc becomes very laggy and slow for an hour or so

I need help. When I open up Fortnite and then close it my pc becomes very laggy and slow for an hour or so. My pc runs great for other games like pubg and Rainbow 6 siege.

Hello,

For Fortnite issues, please visit http://fortnitehelp.epicgames.com/

There you will find various troubleshooting articles as well as an Email Us button that you can use to get in touch with one of our support staff who can assist you further with this.

Thanks