absolutely nothing about the laptop or OS, how can we help? Did you read this, written in RED above where you posted your question:
Note: If you're asking for technical help, please be sure to include all your system info, including operating system, model number, and any other specifics related to the problem.
My computer (laptop) screen keeps blinking a few minutes after turning it on. Eventually, it shows glitches and somewhat freezes. Before, I'd just restart the computer and it would work fine. But now the monitor blinks and eventually doesn't come back up. And then I have no choice but to unplug the computer. Please, if anyone can help me I'd really appreciate it. Thanks.
My guesses are
maybe I need to clean the fan (with an air compressor?)
it could be a virus