Yeah... what ^ she said!
Specially look at the up to date wireless driver... not necessarily from the Toshiba website either, because drivers from PC manufacturers' websites are more often than not a few revisions back from the most recent.
If you know what kind of wireless card it is (ie the device name isn't too Toshiba branded), have a look for some drivers from the wireless card manufacturer's website. If not, the program below might help.
(bit of a diversion this, but a related one!)
If you don't know what an OEM-branded component really is, or you have unknown devices in your Device Manager,
Unknown Devices might help.
It looks up the manufacturer and device ID of the components in your system and will often give you a truer indication of what they are. As it will also look up devices that are showing as "Unknown Devices", er... hence the name I guess!!
I'd better do the usual blah blah .. I have absolutely no affiliation - personally, professionally, financially, morally, sexually(!), etc) with HalfDone.com or the Unknown Devices application. I just really like the program and it's saved me loads of time! It also really annoys me to have to post a disclaimer, not because Kitz says we have to (coz she doesn't!), but just to keep my back covered at all times! So anyway... yeah, it's a great program!!