"This device is blocked by access control in the router."

Hi, 

I'm a desktop gamer and game alot. My netgear router keeps randomly blocking my desktop and I lose all connection to the internet. I then have to directly login to router on my smartphone and go to Access Control and unblock my Desktop. I have to do this compltely randomly. Some days it doesnt happen, some days the routher will block the device four times. 

Please help. I cant keep having it just randomly block me.