Converted drive from MBR to GPT using Microsoft utility (mbr2gpt). Now can't get past the Dell logo on boot. Replaced the CMOS battery, reset the NVRAM. Now after the Dell logo I just get a blinking cursor in the top left. There's info out there on recovering the bios, but how to get the file to put on a USB stick? Dell has lots of updates, but not BIOS.EXE. Nor does another working UEFI T3610. Can't just put a Dell bios update exe file (renamed) on the stick. Could be simple, or fatal. Ideas?