Computers switch off when power fails even after being hooked to a UPS?

2 computers in our office shut down when there is a power shutdown despite it being connected to UPS. Others computers continue to work fine. Why does this happen only with these two computers? What can we do to permanently fix this

Computers switch off when power fails even after being hooked to a UPS?panda

A UPS battery wears out in 2-3 years. Before that, they can also get to a state where they don't hold up the system very long. I have several UPS systems that are on the edge of failure.

I usually replace the batteries in my UPS systems before failure. I buy them from a wholesaler for about $25.

Computers switch off when power fails even after being hooked to a UPS?suzuki

Have a look in Device Manager.

Under batteries, is the UPS driver installed?

Reinstall the UPS driver
I had this same issue some while ago but never found the cause of the problem.

Now I assume that the two PCs just kind of "trip" when power switches to UPS and when you turn them back on they work even if there is no AC power and all 5 systems are running.

If this is the case you should ask your computer technician if the power supply unit on the two PCs is sufficient for the board and processor combination being used. Units with inadequate or inappropriate power supply units can cause the PCs to trip/reboot on power surges.