I recently built a computer and put LinuxMint 17.3 on it right away. I now have a free copy of Windows 10. I haven't really been able to find detailed instructions on how to install Windows while keeping Linux. I know I have to re-size partitions but I have never really used these tools before and would rather not just mess around with them until I figure it out.
First if you aren't sure of what you are doing, make a backup of your important data. Then you have to follow 3 steps :
GPartedand resize your linux partition(s) in order to have at least 20Gb of free space.
- Boot on the
Windows installation DVD/USBand select "Unallocated space" to not override your linux partition(s).
- Finally you have to boot on a
Linux live DVD/USBto re-install Grub (the boot loader) as explained here.
I assure you that if you pay attention there will be no problem for your linux. Good luck !
P.S. : If you want me to give more informations about step 3, I can explain you the steps (