Have you turned off secure boot in bios? Also ignore that Grub link in an earlier post since you are using EFI and not MBR.
The only partition you should touch at all is partition 6 at the moment which is around 373.01 GB so the space is unallocated then try to install mint again. 1,2,5, should be left alone. I wonder why the first 3 show space is 100% free? Partition 7 should also be left alone since I have no idea why its there. I suspect it is a Linux swap partition (where memory for programs go when ram is full). The ordering maybe different in Linux.
If you decide to install it again after you get it installed type in a terminal
. You'll see something like this:
https://www.howtogeek.com/106873/how...ions-on-linux/
This shows how Linux sees all your partitions. How its numbered under
Device (something like /dev/sda6) & the
Type (Linux filesystem & EFI System is what we are concerned with at the moment) is important so you might want a screenshot or write it down for your own reference & so somebody could help you with your Grub problem! Alternatively you could use
to get the information.
There is a graphical program called gparted which you can use to see your partitions in Linux & works similar to Disk Management.