There have been a host of Lithium-Ion related issues with all types of batteries being manufactured out there. Dell included - that have had their...
Follow these Step-By-Step instructions from Microsoft (Win10) to make you USB bootable and format it as FAT32 regardless of size....
Microsoft has an automated "Fix-It" tool specifically designed to help you out. It is legitimately from Microsoft so no worries about Malware...
Try any of these: http://www.burner-software.com/dvd/tools