Option 1: Download from the ViewSonic Website
Go to http://www.viewsonic.com/us/support/downloads/search_driver/
Enter the Product Name. For example, VX2435WM or VX1940W.
Select the driver based on the operating system of your computer.
Click on Open to start the installation. If you select Save, double-click on the downloaded file, and the installation process will start.
Note: The downloaded file is a zipped file. If you do not have a program that can unzip the downloaded file, you will need to download or purchase a decompression utility such as Winzip.
Once you have decompressed (unzipped) the file, double click on it and follow the prompts that appear on your screen. If you see a message from Windows, click on "continue anyway".
Once the installation is complete, restart you computer system. Upon restart your system should automatically detect and select the appropriate monitor driver.
Option 2: Install from the Installation CD
Insert the ViewSonic Wizard CD that accompanied the monitor into the CD drive. The wizard should start automatically.
Follow the installation instructions. If you are selecting to do a Custom install, be sure to select the ViewSonic .inf file installation.
Click on the "Settings" Tab
Upon restart your system should automatically detect and select the appropriate monitor driver.
If the Wizard does not start automatically
Open the "My Computer" icon on your desktop. (Windows XP users can click on Start > My Computer instead).
Locate the drive icon that contains the CD — right click on it and select Explore to view the contents of the CD.
Open the VSFiles folder and then the corresponding operating system folder (9x/Me, 2000, XP) to obtain the drivers.