I got a Satellite C660 1MJ (PSC0QE) Re-installed Win7 Ultimate and Wifi disappeared. Africa Toshiba support has my mode and board driversl but no WIfi drivers! (Go figure.) Google searches and the Toshiba forums couldn't help. I Finally got it working today and thought I should share.
1-Right click on My Computer and select Properties.
2-In the left panel select Advanced system settings. the System Properties window will show.
3-Click on the Hardware tab.
4-Select Device Installation Settings.
4-To the question "Do you want Windows to download driver software..." Select "Yes...". Save changes.
Windows will now look for all unrecognized hardware and find its drivers.
I never liked Windows Update so I had it switched off but this time I was desperate and it worked!
Well done Microsoft!