It doesn't happen when I am on the home screen but after playing certain games for a certain amount of time, it causes it to come up with flashing images and colours chaotically. Can someone give advice on what to do?
Yes, more information on your computer, GPU, CPU, etc... Laptop, desktop, pre-built or home built....
If I had to guess, it's overheating. How does the game perform before the flashes happen?
It runs perfectly fine before hand