I have two PCs in my home connected to a home network using a BT Home Hub. One connects via a wireless connection and the other by an ethernet cable. Both run Windows XP. The PCs seem to have set up a LAN without my involvement and internet and email connects via this. Frequently when I boot up the LAN connection has been lost. The cure for this is to take all the cables out of the home hub and plug them in again. I then reboot and all is well. It is annoying however and I'd like to know how I can stop it. Any ideas? The bloke on BT Broadband help could only suggest I move the router nearer the middle of the house (not possible) and then suggested taking out all the cables and putting them back in again. There must be a better way! Please help.
Have you done any updates to software or windows lately? As I just had the same problem nearly as you after a Upgrade to my Laptop, using HP Update then MS Update. As soon as I pressed on my Browser icon the WiFi disconnected. I had to reload an Acronis Image that I had made just before the above, it's now back working OK