How to check to see which boot mode your computer is in?
The following steps will take and show you which BIOS mode your computer is operating.
Step 1. Please press the Windows Key + R keys at the same time and when the run box appears type MSInfo32 in the box and hit Enter.
Step 2. This operation will open the System Information window box will appear, then look in the box for BIOS mode; it will show either you are running UEFI or Legacy.