I recently bought a new Seagate 1TB sata 3 hard drive to use as a secondary drive in my pc. Prior to that i had a Western digital sata drive which i had no issues with. Since installing the new hard drive my computer shuts itself down instead of just going to sleep. I am using windows 7. (but have not installed windows on the secondary drive, just using it to store stuff). The other day after turning itself off it wouldn't turn back on. I tried a new power cord and it turned back on but was still shutting down instead of going to sleep. Then a couple of days later when I turned the computer on again it went to windows repair mode. Didn't repair it but said if i've installed something recently like a printer to uninstall it and restart. The only thing i've installed is the hard drive so I unplugged it and my pc started up as normal. And it goes to sleep now and doesn't turn off. So I can only think it has something to do with my new hard drive.
Does anyone have an ideas of what is causing it or what I can do to fix it? I'm thinking perhaps my motherboard isn't liking it because my motherboard is about 4 years old now and maybe cannot handle the sata 3 hard drive? But I really have no idea. Any help is appreciated.