![]() ![]() Click View and select Show Hidden Devices.This shows the Computer Management window. Enter Variable Name: DEVMGR_SHOW_NONPRESENT_DEVICESĬlick Start.Click in the System variables (bottom section) click New.click Start / (right click:) Computer / Properties / Advanced System Settings (not Device Manager).However, the instructions on this PDF did work correctly:įor Win7, I adjusted the instructions slightly on that PDF to be: Even a reboot with the "USB to 2Serial Port" device removed did not clean up the system properly. I wrote software to automatically clean up the Registry but though it did adjust the Hardware, Software, and Arbiter sections it did NOT remove the phantom COM port entries.
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