Windows goes to sleep mode as soon power goes out, APC UPS 1.5kva UPS shows remaining mins 40+

Nov 30, 2018
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I'm using APC UPS 1.5kva, whenever the power goes out, my system goes to sleep mode. and i need to restart it. this only happen when the system is connected with the UPS via USB cable. i checked the sleep setting and set it to Never. but the issue is not fixed. please help.