1. This package contains com0com.sys and com0com.cat that were built and signed by Steven William Hatchett. The driver was not been tested by Microsoft WHQL so possible you will get Security Alerts while adding new port pairs. Windows Server 2003 To suppress Security Alerts go to My Computer->Properties->Hardware->Driver Signing and choose Ignore option. NOTE: Suppressing Security Alerts will impair computer security. Windows Vista/Windows Server 2008/Windows 7 To suppress Security Alerts click Always trust software from "Steven William Hatchett". 2. This package contains setupc.exe and setupg.exe marked as "require administrative access" so Turning off UAC is not required.