Battery Not Working

Okay, so recently my battery has been behaving quite weird. First I noticed that it stopped charging around 84%, now it has stopped charging at 67% and it is telling me that my battery has experienced permanent failure and should be replaced. I'm not sure if it is relevant but I have very recently installed windows updates, around the time where my battery started being weird. Not exactly sure which updates, I simply went to the windows update page and checked for updates and updated the computer. Please help me, I would like to try and fix this without having to buy a new battery. The computer model is a Dell Inspiron 15r (model 5521). Thank you.