If you have a second HD port on that laptop then go ahead and install SSD. If you have an OS already on the HD it will configure a Dual Boot - which we can later help you remove.
If you don't want that then enter BIOS setup to disable the HD temporarily while you install to the SSD. After install re-enable the HD to access it's data, wipe it when you don't want the OS any longer after backing up data, or to boot HD use the one-time BIOS Boot Menu key to trigger the HD.
A third option if you can't do either of the above before installing to SSD is to offload your data externally then wipe the HD first with Diskpart Clean Command
from Windows 7 DVD accessing DISKPART At PC Startup.
Steps for getting a perfect Clean Reinstall - Factory OEM Windows 7