Should I replace my Dell Desktop's CMOS battery?

Episode 1562 (1:48:40)

Patrick from Floral City, Florida

Patrick has a Dell Inspiron Desktop and wants to know why his computer doesn't know what time or date it is. Leo says that means the CMOS battery on the motherboard is dead. Just replace it. It's about the size of a quarter.

Patrick is also having issues with Windows, where the tiles don't work anymore. Leo suspects he went into tablet mode, and Windows is just waiting for a touch screen. So turn tablet mode off. Here's how -