Gary> I used to build PCs for myself, family and friends as a side Gary> hobby many moons back but as it became more of a headache I fell Gary> out of it for the most part. But recently I decided to replace Gary> the PC I have had since 2007 even though it was working fine for Gary> my needs. I really wanted an SSD drive, USB 3.0 and less power Gary> consumption. Gary> So all the headaches immediately returned and I remembered why I don't Gary> like to build these any more. Gary> I was able to get the hardware issues I encountered resolved, Gary> but them I was hit with the UEFI problem when trying to install Gary> and dual-boot Windows 10 and Linux Mint. You really really really need to give more details here, otherwise no one will be able to help you. For example, can you install and boot linux Mint by itself without any problems on this board? I assume you can do the same with Windows 10 as well, right? So did you install Win10 first, then shrink it and install the new bootloader to let you choose between Win10 and Mint? But it broke both I suspect. Gary> I'm finding lots of help pages but none have worked for Gary> me. Maybe because I have a newer MB (Gigabyte GA-Z170MX with an Gary> Intel I5 6400). Gary> So I wonder without burdening anyone for specific instructions, Gary> can anyone provide any general thoughts or guidelines regarding Gary> UEFI, Windows 10 and Linux? Check with your vendor for an updated BIOS. Some have bugs where they have locked things down too much, and don't provide a good way around it as I recall. Haven't had to make this leap myself yet... Gary> I'm thinking it might be impossible to dual-boot with my setup but I Gary> hope not. Can't tell really, since you don't give any details. I'd say it's possible, but you might need to tweak your UEFI BIOS to allow non-signed keys to boot. Have you looked at ...uum.... Mathew Wilcox? He's the Linux EUFI maintainer and has a blog out there on stuff like this. Oh wait, it's Mathew Garret. Take a look at his blog: https://mjg59.dreamwidth.org It might have some pointers. But please, more details would help us help you. John