TDSPCS1 This download installs Tektronix OpenChoice Desktop Application V2.6 and TekVISA v4.1.1 Prior to installing this SW: If a previous version of OpenChoice Desktop and TekVISA are already installed, use the Start->Control Panel->Programs and Features wizard to remove the same. Following removal of the older versions proceed to the installation steps below. Installation Instructions: 1. Save the download executable file to your hard drive. 2. Double click the downloaded executable file to begin the installation process. Follow the onscreen messages. 3. You may delete the downloaded executable when the installation is complete. Tektronix USB Drivers for THS3000 Series Oscilloscopes must be installed on the PC for OpenChoice Desktop to communicate to these oscilloscopes. These drivers can be downloaded from http://www.tek.com/ by searching for "Tektronix USB Drivers for THS3000 Series Oscilloscopes" in the Downloads section. Note: If for some reason you are unable to download this software, or if you have successfully downloaded this software but are unable to get the application to work with your Tektronix oscilloscope per the instructions above, please contact the Tektronix Technical Support Center. Customers calling within the U.S. call 1-800-833-9200 (Customers calling within the U.S. call 1-800-833-9200. Worldwide, please visit www.tektronix.com to find contacts in your area).