After upgrading my PC from Windows 7 to Windows 10 at a store, I encountered an issue where the PC would beep once and then shut down when I tried to turn it on at home. Interestingly, the PC worked perfectly when I took it back to the store. However, the problem recurred when I brought it home again. The beep seems to be coming from near the power supply unit (PSU), but I'm not certain. Additionally, the PC remains on longer if I don't move the mouse.