It happens many times we lose Internet access when waking our system from sleep mode, the network icon shows ‘local only’, then normally we restart machine and restore the wireless link. So first you need to check the life of device driver for notebook’s wireless adapter, it may be older than the machine.
So now you will have to update driver, visit the notebook vendor’s site and get the latest version of the driver, download & update then restart machine. Now put machine on sleep mode for a longtime then wake it up and check at bottom-right corner indicate Internet connection.
For that you’ll have to chose correct way to update Window drive driver because wrong selection may be the cause, if anything happens unlikely.
Guideline for driver update
This may be the batter option for those, who are not able to get updated version of driver from the notebook vendors site for the appropriate update, get your driver from the PC vendor. System vendors often customize the drivers for their machine.
Update driver one at a time, if you try to load several driver at a time then it can create some problem and also bit tough to find-out which one is not supporting or creating problem.
Create the restore point, suppose if anything happens wrong during updating of the driver then it can protect from harm. Windows XP an Vista create a restore point before the new driver installation. For precaution set yourself via system restore with descriptive name in case you forget when and what exactly you updated. Roll Back Driver function under the Driver tab in the Device Manager Properties dialog box. Likewise, run the updates own installer rather than using Properties’ Update Driver button.
Mostly PC users can manage their software updates on their own, through vendors help. You can also update your Microsoft Office automatically via the Windows Update service, and other major applications offer similar auto-update functions. Likewise, Flash, QuickTime, and other media players can be set to update automatically.