Can connect wireless on all computers except one, which can connect wired

[nowireless]

I have a really annoying problem. I have one computer in the house which will only connect through the wire and not wirelessly. I have a Belkin Wireless G Desktop card which can see the network and reports that it has maximum strength but cannot connect.

The computer has no problems connecting when it is wired in.

Other computers in the house have no problem with the wireless connection.

I have checked the internet settigns and the Encryption and cannot see anythign that is different on this computer that the other which connect. The fact that the computer can connect wired but not wirelessly suggest that there is something wrong with the wireless card - is this a correct assumption and if so how do I test it?

Bizarrely the computer used to work intermittently wirelessly but has now given up entirely.

Any suggestion greatly appreciated.

Many thanks

[Jelly Bean]

Hello and welcome.

 

Do the following:

 

Click start then right click on my computer and from the drop down list choose properties.

 

Then choose hardware tab then device manager.

 

Use the + next to network in the list to open a secondary list.

 

Makes sure the computer is cabled connected to the router for the time being.

 

Right click on each listed network adaptor and choose update driver.

 

Once each item has updated exit device manager.

 

Shut down the computer and press the reset button on the router.

 

Now restart your computer and see if you now can connect via wireless.