laptop battery wont charge after latest update

there was a mandatory update that came out a few days ago but i only installed it today. everything was fine and i left my laptop. when i came back to it in the evening i noticed that the battery keeps going down even though it's plugged in. it went down from 100% to 50% in about 45 minutes,after that i turned it off to save what's left. it's the weekend here and the comp technician wont be able to come until monday so i thought i would ask here if there is anything i could try. thank you

With the laptop powered on, unplug the adapter from it. Hold down the shift key while you click on shutdown to shutdown the computer completely clean bypassing Windows 10 fast start up. After the laptop is completely powered off, plug the adapter back in. Do you see any indication of charging? If no, then you have a hardware failure. Does the power supply have any LEDs on it, and if so, is it lit?

NavyLCDR said:

With the laptop powered on, unplug the adapter from it. Hold down the shift key while you click on shutdown to shutdown the computer completely clean bypassing Windows 10 fast start up. After the laptop is completely powered off, plug the adapter back in. Do you see any indication of charging? If no, then you have a hardware failure. Does the power supply have any LEDs on it, and if so, is it lit?

i tried that and it did not start charging just went down another 3% in a matter of seconds. light is lit.

Then it sounds like you have a hardware failure, including the possibility of a bad battery.

tom33 said:

i tried that and it did not start charging just went down another 3% in a matter of seconds. light is lit.

Is this a Dell (or HP) laptop? Both use a third centre wire in the charger plug to identify the charger. See...

Bree said:

...Dell laptops are particularly fussy about the charger they use. All Dell adapters have a central pin. This is not a power pin, rather it is a serial data line that is interrogated to determine the power supply's specs....

Genuine Dell laptop power supplies use the 1-Wire protocol to send data via the third wire to the laptop (about power, current and voltage ratings). The laptop will then refuse charging if the adapter does not meet requirements.^[4]

1-Wire - Wikipedia

Battery plugged in but not charging.

If so, it may be a coincidence that the charger's centre pin has just become damaged, or it may be that a required OEM 'ACPI-Compliant Control Method Battery' driver has been replaced by a generic MS one.

no its not a dell. its an acer predator gaming laptop

tom33 said:

... its an acer predator gaming laptop

There are some specific recommendations here....

What is wrong with my Acer Predator 17 when the battery won't charge but laptop works plugged in? — Acer Community