[SOLVED] Dual boot with Windows 10

[gold_finger]

stevedat,

You're welcome, but I meant for you to post back the output of "sudo parted --list" before trying to proceed.  I wanted to see that output first for two reasons:

1. It would confirm whether the drive was using MBR (msdos) or GPT partitions.  Your install options will differ depending on which of those is being used.  If your computer originally came with Windows 10 on it, there is a good chance that the drive was formatted as GPT.  If that was the case, then unless you purposely converted the drive to MBR, LL is installed on that GPT disk in legacy mode.  That's no problem.  BUT, if that is the case Windows can not be installed in that same mode.  It will only install to a GPT disk in UEFI mode.  You'll need guidance to get around that problem.
   
2. If MBR partitions are being used and all three of your LL partitions are "primary", you may run into problems trying to install Windows because it will want to make 2 partitions for itself.  There is a limit of 4 primary partitions on an MBR drive.  You'll need guidance to get around this problem too.  (If not all of your LL partitions are primary, then you won't have that problem.)
   

If you haven't already started, please post that output back here before you try anything.