@SHilton53 - Always include exact PC model and version of Windows in your posts.
If the BIOS update is stuck, you may have no choice but to force power the PC off and then try to boot normally. If you're lucky the motherboard wasn't damaged and it boots. In this case, follow the steps I posted above to update BIOS manually.
Depending on PC model, if it won't reboot, read this for possible steps to recover.
And if you can't recover, read Dell's policy on failed BIOS updates for PCs that are either in or out of warranty.