One windows seven workstation has lost its connection to the internet. it does not matter what browser is used. the network icon in the system tray has a little yellow triangle with an exclamation point and when i troubleshoot it says "the remote device or resource won't accept the connection detected" I tried this solution http://support.microsoft.com/kb/923737
but it did not help, I tried rolling the PC back with system restore but that didn't help. The PC can access all resources on the windows network so it is not a connectivity problem. All other PC's on the network can access the internet.