HP Envy Laptop slowing down the company's WAN but not LAN
Posted on 2016-08-31
HP Envy laptop (Intel i7, 12GB RAM, Windows 10 Pro). Dynamic IP acquired from Server 2012R2 machine
Company moved into a new building (recently built). Server and about 7 computers connected to a DSL modem, 7mbps down, 0.5 mbps up. (Waiting for fibre on this street)
When this HP laptop is connected to the wired LAN, ping times to Google's server at 220.127.116.11 rise from a norm of about 30 mS to 1600 to 2000 mS!
This issue did not seem to exist at their old location (though they were 75mbps fibre there, so maybe it did but wasn't severe). I have removed and reinstalled the network adapter driver. No difference. pings to local PCs appear to be fine, typically <1mS.
The only change in the topography is that the 2012 R2 server is new, and it is now the DHCP server (and DNS). While this laptop is disconnected, no issues are experienced. Probably important: The same issue is experienced when the WIFI is used on the laptop instead.
Any idea of how to troubleshoot this?