Com port numbering

[descendant]

I have a Compaq laptop running Windows XP and my useable com ports are numbered 5, 6, and 7. I now have to work on older phone systems that use software that only recognizes com ports 1-4. When I go to Device Danager to change port numbers I get an error message that says I need write permission. Does anyone know how to change Windows XP to give myself write permission when I am listed as an administrator-level user?

 

[BionicJohn]

Login as "Administrator" - not with another username with Admin rights.

Iechyd da! John
Glannau Mersi, Lloegr.

 

[Sympology]

Take a lookie here and see if it helps:

https://www.microsoft.com/resources...roddocs/en-us/ts_cmd_changeport.mspx?mfr=true

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