Frequent inexplicable linkdead

[Nanyang]

Been experiencing frequent (>=once per hour) LDs for about a month and a half now, with no discernible change in broadband/WiFi connectivity or any other settings. The connection bar will randomly start deteriorating at a uniform rate from 100 all the way down to zero (assuming I don’t /q), entirely out of the blue, and I’ll eventually be disconnected. Prior to this i played on the same pc with the same broadband equipment for about five months with no interruption. During LD episodes, pc WiFi connection shows no loss of signal, and all other devices show no loss of connection. Have entirely rid the pc of anti-virus software (AVG), deleted client, fresh Re-installed eq, the works, to no avail. The only event I might possibly view as related was a random windows update that ran during a restart perhaps around the time this started happening. Any ideas?