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COM1 in use

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CInman

CInman

IS-IT--Management
Mar 15, 2001
81
GB
I'm trying to use a PDA, and installed HotSync on my PC to sync up with the ol' Palm Pilot, but it says COM1 is already in use - by what? How can I find out what is using COM1 at the moment? Any guidance would be very much appreciated.
 
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By definition, COM1 is IRQ4 and I/O 3F8. You may have something on your system using these resources.

Go to Start > Run then type devmgmt.msc. Hit OK

Click View, and Resources By Type.

Expand the Interrupt Request (IRQ) section.

What is using IRQ4?
 
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