BabRabbits: no galaxy wont reinstall
Oh sorry I thought you meant Galaxy was installing games to a nonexistent drive...
Did this old drive include Windows or was it just an extra drive for games / programs. If it is the later you may have some registry stuff that is messing up the install if you had Windows installed on one drive and Galaxy installed on a secondary drive. As GROOT said check if Windows is still showing Galaxy as installed and try to uninstall it. If that doesn't work, you may have to run CCleaner or something like that to clean up the registry. Even if you don't use a secondary drive and instead have Galaxy / Windows all on one drive, this could also happen if Galaxy failed to install for some reason.
Also go to "Disk Management" in Windows and make sure the drive for the new hard-drive is showing and has a working partition
if you are installing to a secondary drive.
You should have a screen during install though where you can pick the hard-drive you want to install too. See pic.