Windows 7 Wireless Configuration and Troubleshooting
Step 5: Disabling and Enabling the Network Connection
Right-click the Wireless Network Connection icon. A pop-up menu should appear.
If Enable appears in the pop-up menu, left-click it and proceed to step 6.
Otherwise, if Disable appears in the pop-up menu, left-click it.
Right-click the icon again. This time, left-click Enable in the pop-up menu. Finally, proceed to step 6.