Its not too important its just an additional/optional security feature and makes the boot slightly faster. This system however will support secure boot if the BIOS is updated to the latest revision: [URL]  
when i purchased my laptop my elder bro created separate partitions in my laptop. here is a screenshot from my Disk Management  [IMAGE] now, i am planing to install Windows 8 (Fresh install not upgrade from Windows 7) but i am little confused about what will happen to my Windows 7 recovery partition(factory restore image)? Will it be deleted and i will be no longer able to restore to Windows 7. if i ever want to in future. Please explain. Regards
Installing Windows 8 on Dell XPS 15 L502x