From what I can track down here, your Satellite C660-A272 model has a part number - PSC0SV-01G01KAR, you can check this on the Toshiba label on the bottom of your computer. So, from a hardware perspective, and for our purposes in finding you some drivers, it is essentially the same as this model:
Satellite C660-162 PSC0SE-01G001AR Specifications
Satellite C660-162 PSC0SE- Downloads
The Windows 7 drivers on the downloads page above will work just fine in your model. But, the order in loading first the hardware drivers and hardware utilities, and then the Toshiba Utilities and Toshiba software is critical for success. Download the appropriate files for your version of Win7 (32bit or 64bit), and install them in this order. These are all zip files, so you'll have to extract the .exe files to install them:
1st Hardware Drivers & Hardware Utilities
Chipset Utility - Intel
Display Driver - Intel
Sound Driver - Realtek
then all other hardware drivers and hardware utilities
2nd Toshiba Utilities & Toshiba Software
Value Added Package - Toshiba
Flash Card Support Utility - Toshiba
then all other Toshiba utilities and Toshiba supplied software
Please let us know how it turns out. Good luck.
Mike