Go back to when it worked. Uninstall, System Restore.
Fixing it with what information you supplied looks to be impossible.
bob
my wireless home networking has worked fine, then I installed a virus program(i.e. V3)w/ firewall. then it suddenly goes off by itself in l0min. In fact, I need to reconnect every 10 min. Please give me some clues.
thanks

Chowhound
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