================================================== Attention: Install USB Driver First!!! ================================================== Before connecting the AHP-301CPV, AHP-1200CPV, AHP-1800CPV, AHP-2700CPV, AHP-1200DCP, TLC-900, RLC-900 and RLC-1800 to your computer USB port, and before installing the "tecaLog" software you need to install the USB Driver. STEP 1: Open the "USB Driver" folder and double click on the "PL2303_Prolific_DriverInstaller_v1.5.0.exe" and follow the on screen installation steps. (For more information on how to install the USB Driver please read the "um_pl2303_DriverInstallerManual_v1.5.0.pdf" in the "USB Driver" folder.) STEP 2: Open the "tecaLog" folder and double click on the "tecaLog.exe". Follow the on screen instructions to install the "tecaLog" software on your computer. STEP 3: Reboot your computer. STEP 4: Connect the TECA unit to your computer USB port, power up the unit and start the "tecaLog" software.