Hi I have an old Qosmio G15 series laptop, I recently had the hard drivers replaced because they had become damaged and the os updated from XP to 7. Now however I can't get my wifi to work,I've tried the wifi switch on the side and the fn f8 key combo. Someone at staples told me I might have to try redownloading the wifi drivers but I'm not to sure where to go to do that. If anyone could help it would be greatly appreciated. Thanks.
Your notebook is too old and is not listed as a Windows 7 Compatible Model. There are no Toshiba supplied Win7 hardware drivers or utilities for your system. This will likely create other as yet undiscovered problems for you with Win7. If getting your WiFi working is important to you, I would strongly suggest that you revert back Windows XP.
The easiest way to do this would be with the original Toshiba Recovery disks that came with your computer. If you no longer have the disks, then you'd have to order them from a 3rd party supplier. Toshiba does not supply disks for units built before 2006.
You could try these thirdpartyrecovery media suppliers. But, wehavenoinformationonthem so use caution.
The main problem is that Toshiba uses proprietary cards and often connectors. The chipsets may be made by Intel, Atheros, Realtek, etc, but they are tweaked by Toshiba to work in a Toshiba unit.
Also, not being able to install the 'Toshiba Value Added Package' for your model, (this would have been the Toshiba Common Modules in XP) will likely prevent you from enabling/disabling the WiFi (Fn+F8), perhaps your touchpad, etc.
Look on the Toshiba label on the bottom of your notebook and confirm whether or not this is your model. If yours is not a USA model, give us its part number off that label.