Looks like this might be it. I'll find out when I try it tonight. Thanks everyone. Hopefully this one will do what I want. I'll let you know what I find out. Tamas Rudnai wrote: > John, > > NTFiles can tell you who is opened the port by looking at the file > \DEVICE\SERIALx - x is the port number > > http://www.smidgeonsoft.prohosting.com/ntfiles-file-lister.html > > Hope it helps > Tamas > > > > > > On 1/18/07, Tamas Rudnai wrote: > >> You may have a dialer hiding on your computer -- Normally it should be >> detected by Norton Internet Security if you have the latest virus database, >> however, it can be also a very new one. >> >> Tamas >> >> >> >> On 1/18/07, John Pfaff wrote: >> >>> I haven't tried safe mode yet. That will probably let me use it, but >>> will I be able to figure out what is using it when it's not in safe >>> mode? >>> I have tried disabling the port in device manager, but nothing >>> complained. >>> I also tried installing another serial port, a USB device that became >>> COM4. I couldn't believe it when I tried to open COM4 with Hyper >>> Terminal, it gave me the same error message (telephony device is in >>> use). >>> >>> Richard Prosser wrote: >>> >>>> Have you tried running in safe mode? >>>> Normally if this happens to me I just restart and it comes right. >>>> Have you tried looking at device manager and disabling the port and >>>> seeing if anything objects? >>>> RP >>>> >>>> On 18/01/07, John Pfaff wrote: >>>> >>>> >>>>> I've looked all over, and can't find the answer on my own, so I'm >>>>> >>> asking >>> >>>>> the smartest bunch of people I know. >>>>> I'm using Windows XP, and can't use one of the serial ports. I'm >>>>> >>> trying >>> >>>>> to install a drawing tablet that uses the serial port, but now matter >>>>> >>>>> what I try (Hyper Terminal, Tera Term, PortMon, other programs that >>>>> >>> use >>> >>>>> the serial port), nothing can use it. The error message I get says >>>>> >>> that >>> >>>>> something else is using the telephony device. Is there any way I can >>>>> >>>>> tell what process is using the serial port? I've tried >>>>> >>> Googling. About >>> >>>>> the closest thing I've found is a Microsoft utility called PortMon, >>>>> >>> but >>> >>>>> even that can't attach to the serial port and won't/can't tell me >>>>> >>> what >>> >>>>> is using it. >>>>> I don't know if the serial port has ever worked properly on this PC. >>>>> I've checked BIOS settings for the port. Is there any possibility >>>>> >>> that >>> >>>>> Norton Internet Security is doing something? >>>>> >>>>> Thanks, >>>>> John Pfaff >>>>> -- >>>>> http://www.piclist.com PIC/SX FAQ & list archive >>>>> View/change your membership options at >>>>> http://mailman.mit.edu/mailman/listinfo/piclist >>>>> >>>>> >>>>> >>> -- >>> http://www.piclist.com PIC/SX FAQ & list archive >>> View/change your membership options at >>> http://mailman.mit.edu/mailman/listinfo/piclist >>> >>> >> >> -- >> unPIC -- The PIC Disassembler >> http://unpic.sourceforge.net >> > > > > > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist