Hi, and welcome to LQ! You can do that, but then you will have to reinstall the boot loader back to the master boot record, as Windows will replace it with its own. You probably have Grub2 as a boot loader, so you might want to use the Super Grub2 Disk
in order to repair it after the Windows installation. You can also chroot
into your Linux system from any live media that can boot to a shell (I like System Rescue CD
very much, but I also use Slackware's installation discs for such tasks): this way you can reinstall Grub2 to the MBR from inside your existing Linux system.