For your reference:HP 655 Notebook PCSupport page for Driver for the HP 655 laptop.
You just select the correct OS (Win 7 32bit or 64bit, in your case) and scroll down to the correct driver that you want. You will need to put the driver onto a Flash drive or possibly an external HD and move over to your laptop.
P.S. It's more than likely that Windows 7 already has a WiFi driver for you computer and might just need enabled, but I have the links above in the case that you don't have the drivers.