Find out BIOS Version from Windows
Press Win + R & enter
msinfo32
Then you can navigate and look for all kinds of information, including the BIOS version.
You also can find out your BIOS version on cmd
typing:
wmic bios get smbiosbiosversion
It will return only the version. msinfo32
will provide you all the information about the BIOS.
As a third option using Powershell:
Get-WmiObject win32_bios
You can find the other possible properties by piping Get-WmiObject win32_bios to get-member to show the other possible properties.