Hi, folks: I just installed shadow user pro v.2.5 trial version. After reboot, I got a small alert window indicating: Error 0 communicating with the driver, please reinstall the program. I followed the instruction and did a repair, reboot, but the problem remains. I have FD-ISR, outpost firewall, KAV 6 ,blackice, and winpatrol plus. Is any of these security apps having something to do with this problem? Your help is greatly appreciated. Thanks.