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 -- 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