I have a perfectly fine inspiron 17r. However, the battery will not hold a charge.

Dell no longer sells replacement batteries, so I purchased one online. Generic.

It is 86% charged, but the computer will not work. It died.  The seller says it is fine, but I may have to clear something. 

If Dell isn't going to sell replacement batteries, I think it fair that they help get other batteries to work.  Any instructions for windows 10 would be greatly appreciated!!! Help!