So, we roll into March, I'm over winter illnesses, and I have plenty of free time on my calendar to work on my various and sundry boat projects... that's about the time that my computer (which holds all my finances info, etc) decides it is going to start rebooting every 15 min to 4 hrs. Hmm.... system randomly resets, getting faster with each time as it warms up. Sounds like something is overheating. Random reboots are typically temperature related, failing Power Supplies, RAM issues, driver issues, Operating System related issues, or Graphics card issues.