Net diagnosis in windows 7
lick the
Start button , click
Control Panel, and then, in the search box, type
network. In the list of results, click
Network and Sharing Center, and then click
Troubleshoot problems.
Click the
Start button , click
Control Panel, and then, in the search box, type
adapter. Under
Network and Sharing Center, click
View network connections, right-click a network adapter, and then click
Diagnose.
Open Event Viewer by clicking the Start button
, clicking
Control Panel, clicking
System and Security, clicking
Administrative Tools, and then double-clicking
Event Viewer
. Administrator permission required If you're prompted for an administrator password or confirmation, type the password or provide confirmation.