Tactical Software redirectors are able to create any virtual COM port from COM1 to COM4096 that is not already defined on the computer. If a certain COM port is not in the redirector's Select Ports list, then it already exists on the PC.If there is a real hardware port in the system (such as COM1) the real COM port will need to be removed from the Windows Device Manager and then disabled in the PC's BIOS on system boot before the redirector can create an identically numbered virtual COM port.The following Windows Registry entry shows what COM ports are defined on the system: HKEY_LOCAL_MACHINE/Hardware/Devicemap/Serialcomm/Any COM ports with the names starting with DISerial, DESerial, CISerial and SISerial were created by Tactical Software redirectors.To remove any other COM ports, find the process/program that created them and remove them with that program.Do not delete any COM ports directly from the registry as that may cause serious system problems.However, COM2-10 on Citrix/Terminal Services PCs can be deleted without any issues.