PC wont boot up

[Domantas_1]

Basically my pc was working fine yesterday, and today I woke up, turned the pc on and I get the error: Alert! System battery voltage is low.
Strike the F1 key to continue, F2 to run the setup utility
Press F5 to run onboard diagnostics
Ive had this error pop up a long timr now and it didnt seem like a problem cause i just pressed F1 and it booted up all up no problem, but now once i press f1 it just restarts the pc and ends up at the same error for thr voltage, any ideas how to fix cause the pc is basically unusuable

 

[B-man33]

Try and replace the cmos battery which is located on the motherboard

 

[combinebasic]

Check the BIOS battery using the voltage ohmmeter, if the bios battery is low now replace it. Follow this to discharge properly the bios settings. change CMOS jumper to clear then remove the battery, then reinsert the bios battery then change jumper to normal. You can also use the default settings of BIOS either pressing the f9 key or any to return the default settings