of China Hungary India Indonesia Ireland Israel Italy Jamaica Japan Kuwait Latvia Lithuania Luxembourg Macao S.A.R.
Anguilla Antigua and Barbuda Argentina Aruba Australia Austria Bahamas Bangladesh Barbados Belarus Belgium Bermuda Bolivia Brazil Bulgaria Canada Cayman Islands Chile China Mainland Colombia Costa Rica Croatia Curaçao Cyprus Czech Republic Denmark Dominican Republic Ecuador Egypt El Salvador Estonia Finland France Germany Greece Grenada Guatemala Guyana Haiti Honduras Hong Kong S.A.R. Once you have the brightness at the desired level, click the X in the upper-right corner to close the window. In the Power Options window, at the very bottom of the window, click to move the Screen brightness slider to the desired level. 
In the System Tray, right-click the Power icon, and then click Adjust screen brightness. NOTE: If you have completed all of the steps above and the function keys still do not adjust the brightness, you can manually adjust the brightness using the power settings by following the steps below: Verify the VAIO® Event Service is started and set to automatic. NVIDIA GeForce® 9300M GS Video Driver Update. Download and install the following updates, in the order listed, from the Sony® eSupport Web site.ĭownloads are posted on your model support page. Though we cannot guarantee the functionality of any drivers on any installed retail version of the operating system, if Windows 7 drivers are not available you can try using the available Windows Vista® drivers. All of the following drivers may not be available for all models and all versions of the Windows 7 operating system. 
Follow the installation instructions precisely as listed on each driver Web page, including restarting and shutting down the computer when required. 
follow the procedure below to resolve the issue. When the function keys, F5 and F6, which allow you to adjust the LCD brightness, do not work after upgrading to the Windows® 7 operating system.
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