Not all allow such a change so a software patch is needed like this one:
Try "SERIAL PORT MAPPING" or MAPPER in google.com to find other softwares that do this.
Thanks in advance for any help,, using a gateway laptop, running windows xp media center. using a pc card for a serial rs232 adapter, when I installed the card defaulted to use com4, need it at com1.. when I go into device manager and click properties for the card, I dont get the port tab that all the help ive located said would be there for changing it. I do have administrative rights for my log on,, I have also tried to logon in safemode as administrator, but in safe mode the card is not loaded and there still is not any port tab in the device manager.. what am I doing wrong??