You should update all the drivers, but start with the Chipset, LAN and wireless drivers from the
Windows 7 64Bit Drivers section. http://www.drivertoshiba.com/satelli...7-drivers.html
I am not sure which Wireless driver you need, Intel or Atheros. You'll have have a look on your system.
What also would help is what are you doing before the Blue screen appears, playing a game, watching a movie online?
Hope this helps.