if you install win it's override the bootloader, if u install a linux distro (and have enough space left on ur partition) then it's doable (can be quite a pain in the ass depending on ur distros and bootloader, etc)
1. Which OS is currently on that partition?
2. Which OS do you want to put on that partition?
3. Where is your data?
4. How many partitions do you have accessible?
5. Do you have a boot/grub partition?
6. Do you have a swap partition?
if you install win it's override the bootloader, if u install a linux distro (and have enough space left on ur partition) then it's doable (can be quite a pain in the ass depending on ur distros and bootloader, etc)