For the past couple of weeks, my computer has been restarting itself. When I check the event viewer, the only event that corresponds with the time of restart is Event ID 64, which reads as follows: "Certificate for local system with Thumbprint 00 a8 d0 db 52 d2 7c 97 18 ed 7e 98 f5 f7 83 f8 f2 52 04 d8 is about to expire or already expired."