i could be wrong but sounds like a malicious proxy to me.
in internet explorer go to
Tools>Internet options>Connections>LAN Settings
make sure all of the options are unticked, and restart internet explorer.
chrome
Wrench menu>Settings>Change proxy settings>LAN Settings
make sure a proxy isn't being used here
in internet explorer go to
Tools>Internet options>Connections>LAN Settings
make sure all of the options are unticked, and restart internet explorer.
chrome
Wrench menu>Settings>Change proxy settings>LAN Settings
make sure a proxy isn't being used here