I can't figure out how to turn the wifi back on... I've been to Google with no luck and can't even find a product manual. Can someone please help me figure this out? Here's the page on Toshiba's web site: http://us.toshiba.com/computers/laptops/satellite/e305
For the Toshiba Satellite E305, if all your drivers are installed properly, and nothing is disabled unnaturally, pressing FN + F8 on your keyboard should enable or disable the built in wireless adapter.
That is from chapter 4, page 127 of the user manual, which can be found on the Toshiba Support site: