Allen Berrebbi wrote:
Is it Vista? They have had issues with that.
Do you know how to login to your router? What model is it?
It is Vista, as it happens, but the other computer that the same thing is now happening with is Windows 7.
Sorry I haven't replied to any of these before now, guys! I almost forgot I'd asked the question, and haven't had a chance to try even the simplest solutions. I'll give them a go in a couple of days and see how I get on (got to take Gwyn to the Dr Who Experience in Cardiff tomorrow, and lots of other holiday-related things going on). I appreciate the assistance though!