|Thank you for replying.|
1. No, internet speed is normal on my desktop pc when the cable is plugged off either the laptop socket or the modem.
2. When disabling the connection from the laptop in Control Panel, with the cable still in place, the speed is still reduced.
Strangely enough this morning I tried using Internet Explorer instead of Chrome and now I get around 1.5 - 2Mbps out of my 20Mbps connection (tests on speedtest.net), with chrome I get the around 0.6Mbps as usual or just connection error message from the website. What's more strange is that upload speed is working at full capacity (with IE), just the download speed is getting slowed down this time.
No, I've disabled automatic updates for anything except Adobe Flash Player, which is up to date. No software runs when the power adapter is plugged, other than then Power Plan thing from Windows, adjusting screen luminosity etc.
I've also installed a network monitor program just to be sure and nothing strange happens with download/upload speeds the moment when AC adapter is plugged.
message edited by alxv1