Don't have to assume much about a new drive not having Windows installed, none do.
You have a few options. Use your restore disks (you can make a set as most vendors provide a utility for that) to install Windows on the SSD. You can also use a cloning or imaging software like Clonezilla to make a copy of your hard-drive on the SSD, which you'd install as a second drive. Then just make the SSD the first bootable device in the BIOS, should work.