I've had my PC for around 6 years now and it sometimes gave some troubles like every other PC, but now it's doing a weird thing when I try to boot it up. It boots up for a few seconds and then shuts down, then starts booting up for another few seconds and then shuts down again, repeating this process over and over again until finally out of nowhere it boots up and it just runs like nothing happened. Is something wrong with my PC? Should I be worried? Thanks in advance!