1. Goto HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ Dnscache\Parameters 2. Build A dword that is new value NegativeCacheTime (the worthiness is instance sensitive and painful) and provide it a value of 0 (this is certainly a ZERO).
Since all three computers are impacted and I also assume all of them are attached to the modem that is same router, i do believe your trouble lies with one of these. (more…)