Thus, do you know how to fix the issue PC turns on by itself? If no, please go on your reading, this post will list five methods to fix the problem computer turns on by itself Windows 10. No matter what the reason is, the most important thing is to fix this problem. The issue computer automatically turns on may be caused by various reasons. Have you ever met the problem computer turns on by itself or laptop turns on by itself and do you know what the reason for this problem? As a matter of fact, it is a common issue since many people have encountered this problem. 5 Solutions to Computer Turns on by Itself.