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Windows 10 Repeatedly Reboots
I reinstalled Win10 to solve a repeated "Bootmgr is missing...." error, and now my Win10 system continually reboots. Each time the system boots up it remains stable for a few minutes, but after a few minutes of inactivity it reboots. The rebooting does not occur while I am actually using Win10, but only when it is idle. I disabled Windows Update. Sleep is off. Any further ideas or suggestions? Could it be a hardware problem, e.g. bad hard drive, BIOS or device drivers? I am stymied.