prolific usb to serial comm port com3 windows 10

2nd Stage Again from Elevated Command Prompt - Remove Driver Packages from drivers store.

1st stage As discussed from command prompt type ĭevmgmt.msc Under Ports (Com & LPT) delete all instances of prolific USB to Serial Comm Port.

Ie type cmd in search bar then right click cmd.exe selecting Run as Administrator The Computer Management system has cleaned up the Arbiter, but not cleaned up the Software section.

So only the 'Arbiter' setting seems to be telling the Win7 system what is really 'in use'. All the other settings up to 7 that used to be 'in use' are now freed up. Shows COM1 with COM2 'in use' and COM3 'in use'. Right click on COM1 / Properties / Port Settings / Advanced Note: after cleaning out all my phantom ports, leaving only 'COM1', I find my Registry shows: Hardware: COM1Īnd a right click on Computer / Properties / Device Manager / Ports shows only COM1. This should now have cleared out your system of unwanted phantom USB ports.

One by one, right click the phantom ports, and select Uninstall.Now all the ports, real (black text) and phantom (grayed out text) appear. 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.

Prolific usb to serial comm port com3 windows 10