Hi,
I was wondering if you have typed the right model of your PC. From the
offical webside, it does not show up with a search. Or it is a legacy PC which SONY stopped support. Please understand that even though windows 7 has the basic drivers builded-in, when it comes to OEM (Original Equipment Manufacturer), it is the manufacture's job to write a compatible driver according to the latest operation system not Microsoft.
At this point, you can download the
corresponding driver for other version PC and install them in compatible mode:
HOW TO: Install a Hardware Device Driver using Compatibility Mode