Hi, Thank you for your interest in Windows 10. It’s really unfortunate that you are facing this issue. But don't worry we will try to help you out.
The Official Toshiba Support Website provides support for Satellite A660-BT2G22. Look under Windows edition for the version and edition of Windows that your PC is.
I would suggest you to visit computer manufacturer and install the latest available drivers for network. If drivers are not available for Windows 10 install drivers in compatibility mode and check if issue persist. Amd Radeon Hd 7500 Driver Windows 10. Follow the steps below on how to install driver in compatibility mode: • Download the driver from the manufacturer’s website and save it on your local disk. • Right click on the setup file of the driver and select “ Properties”. • Select “ Compatibility” Tab. • Place a check mark next to “ Run this program in Compatibility mode” and select operating system from the drop down list. • Let the driver install and then check the functionality.