DougQuaid

you can easily disable secureboot in bios, if you want, you can even disable uefi boot and use old style bios booting. I am using UEFI with dualboot windows and linux without any issues....I just press f12 during startup and then I can select if I want to start windows or linux. It's even easier than before, since I don't have to do magic with grub and/or windows loader as before

I'm reporting that I successfully upgraded my bios from 2.07 to 3.05 with file from skoczi. (I'm using windows 8.1 pro from my dreamspark premium account, so I will not miss my oem win8 key, although I have my old bios backup). The differences that I noticed are that now there is new bios setting that can be used to disable discrete graphics and use only integrated. Also cpu microcode was updated from version 9 to version 12 (with new microcode my cpu power consumption seems to be slightly lower in idle, but I will need further testing).

But that doesn't always work. For example, dota2 always uses nvidia card (there exist some API that can be used to force nvidia graphics when running on optimus regardless of settings), even if I set it to use integrated graphics, only way to use hd4600 in dota2 is by disabling nvidia card in device manager

You can disable the gt750m in device manager (it works without restart). then it will always use hd4600, which has much better performance on battery than underclocked gt750m. I don't think that there is any way to increase gt750m clock when on battery