Dualboot Windows and Linux Help

Soldato
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Not sure if right forum to ask but here goes. I have installed Windows 10 Pro using GPT partition (UEFI) and I have created a 45Gb partition for Linux Mint (current nothing on it).

Using Rufus I have tried making Linux Mint bootable on a Usb 3.0 dongle but no matter what I cannot get it to boot. Here is the thing though, I originally had Windows 10 installed with MBR partition scheme and I could boot Linux Mint from the dongle but it would not let me install it because it said the partition must be UEFI GPT.

So I have since wiped everything and reinstalled Windows with UEFI GPT partition scheme and as already said cannot get the Usb with Linux Mint to boot.

I was reading it could be something to do with Secure Boot in the BIOS which is enabled by default but I cannot see an option to simply disable it. I have also set OS Type in BIOS from [Windows UEFI Mode] to [Other OS] but still no luck.

My final attempt is I may need to delete the secure boot keys from PK Management in order to disable secure boot (I read this somewhere). After several attempts I managed to save 4 keys to dongle (db, dbx, KEK and PK) but I am little hesistant in deleting these keys.

MUST I delete the secure boot keys in order to get Linux to be recognised by my Usb dongle and work on UEFI GPT partition? If I delete these secure boot keys will it affect Windows, can they be factory restored (ie clear CMOS) or must the saved keys be restored?

Sorry it all seems a little mad, I don't fanatically use Linux, last time I tried it was maybe 3 years ago and it just worked easily. Now though all this UEFI and Secure Boot stuff seems to be making a seemingly easy task rather tricky. I just wanted to set myself up with a dual boot and have a play with Linux again. If Mint does not work I may try Ubuntu or something.

Motherboard is ASUS Maximus VIII Formula.

Appreciate some help cheers :)
 
All sorted now, for some reason even though I set in the BIOS UEFI SanDisk Extreme (my dongle) as first boot option each restart kept putting Windows Boot Manager as the first boot option.

So if ever I need to boot off the Usb dongle I have to change the above boot order as a one off otherwise it keeps reverting back to Windows Boot Manager.

For the record I did not need to delete any secure boot keys or disable secure boot or anything like that.

I have now installed Linux Mint, the only issue is restarting Mint seems to take forever (like 45 seconds on a Samsung 950 NVM M.2 SSD) but maybe thats for another question some other time.
 
Dual booting might expose you to any recurrence of the windows 10 issue where other partitions become unallocated; so having two separate/swappable disks maybe more robust, as discussed in win 10 au update thread ... issues like that put me off using a single disk, where, despite win 10 pro, I might not be able to control win 10 updates.
 
Dual booting might expose you to any recurrence of the windows 10 issue where other partitions become unallocated; so having two separate/swappable disks maybe more robust, as discussed in win 10 au update thread ... issues like that put me off using a single disk, where, despite win 10 pro, I might not be able to control win 10 updates.

Thanks for the tip I wasn't aware of this issue
 
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