The UPS hardware and/or software could be the problem. You have to try something to fix the problem. Seeing as there was/is an error message I would start there!
When the computer is first starting up, before you get to your desktop, a screen will appear (usually black with white letter, just like an old DOS screen) and it will give you a few choices. The choices will say to press one of the function keys (F1 thru F12), but I'm not sure which one. It's either F2, F8 or F10 if I remember correctly without rebooting now.
As soon as you see the selections on the screen, press the applicable key quickly, because it does not wait too long.
Get the UPS out of the wiring. Turn off the computer for a minute (Do NOT just Reboot). Push the button to restart and then press the applicable function key. I think its F2.
Turtle is HI all the time. He (she?) is about 4 feet off the ground at all times. Turtle is mounted to the base of a bird bath (minus the bath). This keeps Turtle away from all the riff-raff that scurries about, like those damn froggies.