PC doesnt recognise Wireless usb adaptor

[WhiteBears]

i bought a Tenda w311u wireless adaptor for my pc so i can use the internet wirelessly (connect to virgin media router in the house), but when i insert the usb my pc dosnt seem to pick up the new hardware.... i went to my computer to see if its showing there but nothing even when i refresh it. the green light is lit on the usb but not doing anything. i went to control panel to add new hardware but still cant find it, i also put in the cd to install the program, it keeps asking me to insert the adaptor but its already there, where am i going wrong?

ive inserted to every available usb slot but no joy, ... i inserted the usb adapter into my laptop and the laptop picks up new hardware straight away.... help!

[vascop]

Could be that the USB slots are not wired up internally. Do you have a USB memory stick? If so does your computer recognise that?

[ACtheTROLL]

install drivers first - then insert dongle
if dongle already there - confuses thing ... that's why it tells you when to plug it in

[WhiteBears]

its not the usb. the usb is working for other things.

troll, i tried to instal the software but stil cant find the usb when it ask me to connect it.

[ACtheTROLL]

did you uninstall what's there - reboot - install again
bung in the usb

usb can be extremely fussy - and wireless dongles are among the fussiest

[WhiteBears]

troll thanks for coming back to me. i dont think theres anything to uninstall, cos i cant find the driver.

[WhiteBears]

ive fixed it :D yayayayaaaaaaa

i just installed a new driver and it worked :) x thanks all for your help