This is the wireless adapter not a good sign if device manager doesnt show the device even as ? unknown device or network adapter.
Try enabling your wireless while viewing device manager see if it pops up in the device manager list, if so you can then install the driver.
Wireless LAN is integrated in your notebook.
Switching wireless LAN module on and off
Check whether the wireless LAN module is activated/deactivated in
the installed wireless LAN software.
► You can use the Wireless LAN Easy Launch
key to switch the wireless LAN module
on and off,
Driver download may be required also : FSC Launch Manager
under Tools and Utilities
for this product from http://uk.ts.fujitsu.com/support/downloads.html