Older computer, came with Win 8, upgraded to Win 10, running Insider Preview. Don't use computer often. When I turn it on after being off for a while, it start up to where it is starting to load Windows, then stops. Timing circle stops as does all disk activity. Turn computer off by holding down power button, then turn on again, and it boots normally. Rebooting also works. Ran hardware tests from BIOS, all ok.