loss of all networking facility

Strange but true. One minute I had a wifi network going then a reboot and
nothing.

I have (had) a Belkin wireless router and modem and my PC has a wireless
network card.

My son runs a laptop with a Belkin USB network adaptor from the same router.

After the reboot I had lost all the adapters. Going into Device manager all
I get is a blank. Nothing shows at all.

Even the modems have been "removed" and I cannot even access the internet
through dial up either.

The regular LAN card is missing too.

I have got round the problem in the short term by installing the USB network
adaptor onto the desktop but I am a bit stumped as to what I have to do the
restore my devices.

Also, when I try and access My Computer, the computer goes off on a long
search before showing the detail. It does this every time even if I just
close the window and open it immediately.

Help much appreciated if only just to get my son off my back.