Using LOWCDC.SYS on Vista x64 This is the Readme file about AVR-CDC x64 patch drivers. This method was informed and was tested by Benjamin Kerschner. SUMMARY ======= Vista x64 does not accept unauthorized kernel-mode drivers. To use AVR-CDC on 64bit machine, you have to turn the "Driver Signature Enforcement" off by pressing the F8 function key during system boot up. "Driver Signature Enforcement Overrider" signs the driver as a testdriver and activates a testmode so you can load it without a real signature. You can find a more detailed description on the download page of the overrider http://www.ngohq.com/home.php?page=dseo USAGE ===== To install the driver: 1. Download the "Driver Signature Enforcement Overrider". http://www.ngohq.com/home.php?page=dseo 2. Start the DSEO (no installation is needed). 3. Choose "Sign a System File", click the "next" button and sign lowcdc.inf. 4. Choose "Sign a System File" again, click the "next" button and sign lowcdc.sys. 5. Choose "Enable Testmode" and click the "next" button. 6. Restart your computer. USING lowcdc.sys FOR FREE ========================= The lowcdc.sys is published under an Open Source compliant license. See the file "License.txt" for details. Osamu Tamura @ Recursion Co., Ltd. 30 March 2009