Hi,
Start by doing a Windows Update and install the important update there is available. If these will not work here are some more troubleshooting steps you can try.
- Uninstall/reinstall "microsoft acpi-compliant control method battery" in Device Manager. Once uninstalled reboot your laptop and it should reinstall automatically then observe if the same problem will persist.
- Next is to change some settings in Power Option. Right click on the battery icon and select Power Options.
- Change the Power plan to High performance and see if the same problem will persist.
- Do try another AC adapter that has the same voltage and see if it will do the same because if not you'll need to contact Acer for a replacement AC adapter.