|Laptop batteries stink. |
Your problem could be any of the following or more.
Software is wrong, battery is bad, charging circuit is bad, connections are bad, power supply is bad.
I'd remove the battery and try to power the system with the power supply. It should work.
Look at the battery and connections. Be careful if any liquid or other substance on battery.
This is where I'd use a volt meter to test battery voltage and if I can get to charging or see if really charging. Might have to have a shop or friend to do that.
Might have to just hope and buy a new battery if you don't have any other ideas. It may or may not work.
This is the part of the story I consider a new laptop. They are not much more than a replacement battery in some cases.
"Best Practices", Event viewer, host file, perfmon, antivirus, anti-spyware, Live CD's, backups, are in my top 10