Thread: Delete unused Com-ports which say inuse

One thing is to see if hidden devices are taking up the ports:


A. Click Start > All Programs > Accessories and then click Command Prompt.
B. Type set devmgr_show_nonpresent_devices=1 in the Command Prompt and then press Enter.
C. Type cd \Windows\system32 in the Command Prompt and then press Enter.
D. Type start devmgmt.msc in the Command Prompt and then press Enter.
E. Click View > Show hidden devices. This will display devices that are not connected to your computer.