Here are the facts:
Other devices will connect just fine to the signal.
One morning I was using the internet fine and switched off the PC, when I came to use it later that evening it could not detect any wireless network. Nobody used it in between. The only thing that may have altered the PC was the possible installation of Windows updates on shutdown.
I can connect to the internet by tethering my mobile via USB.
When I hover over the computer symbol on the right hand side of the taskbar, the popup states 'Wireless networks are available.' However when I click it open it states 'Windows cannot find any networks.'
When I click 'diagnose and repair' it tells me 'there might be a problem with one or more network adapters'.
When I tried to open device manager, I got this message: 'MMC cannot open the file C:\WINDOWS\system32\devmgmt.msc.' and I have since fixed it here.
Windows vista 32 bit.
Atheros AR5005G Wireless NEtwork Adapter, driver version 126.96.36.1998
Nvidia nForce 10/100 Mbps Ethernetm driver version 188.8.131.52
If anyone can provide me with some help I'd be extremely grateful.