You need to go to the MSI website and read the manual for your specific board. It will explain everything you need to update the bios, if it's necessary at all.
And for your information, BIOS and UEFI are generally used interchangeably, since they do the same basic startup controls (in different ways). However, your system will have just a BIOS or UEFI, not both (at the same time, though Sandy Bridge boards typically received upgrades from BIOS to UEFI afterwards)