Hello, I would be most grateful for any help I can get with a problem I am having with my newly built PC. It restarts randomly with no error message before hand. At first I thought it was the hard drive as it is the only old component in the build but I ruled that out as the same happened when I booted an OS from a flash drive. I now think it may be the PSU, is there any software I can use to check it? Any help will be appreciated, thanks.