I have an NV7802, original battery. Windows 10. Last night I noticed that the battery was not charging whike plugged in. I removed the battery, plugged the adapter in no power. Purchased an adapter this morning, battery charges for about 10 seconds. Battery is now dead and laptop will boot up when plugged in with the battery installed, lets me logon and then shuts off with no lights on the front panel. I think this a windows problem and I have notified them also.