aaah! the joys of wireless networks ....
the cause could be so many things ...
your neighbour's wireless network (change channel)
your microwave, TV, Radio ..... basically anything electrical ....
Can you think of anything you've started doing again recently - or anything you do while hubby surfs?. Has hubby started sitting in a different chair (walls can cause reduced signal strength either by blocking or reflecting).
sit hubby in front of your Wireless access point .... how's that?
move him to where he sits when the problem starts .... what's between him and the WAP?
has the wap fallen behind a radiator? Has it been "tidied away" under the TV? ....
What is the second PC using to connect (usb or card in the back of PC?) - if USB .... is the arial masked by the PC box, radiator or ...
The ideal position for a wap is as high as possible in the centre of the house -
and for the PC ... out in the open ... above the box
A friend recently lost his connection .... turned out his wap had never worked .... his neighbour had moved house taking the wap he'd been using for months with them!
sorry ... but this sort of thing isn't always easy to find ....
then again is could just be as simple as a bad connection to the PC