Multiple driver installations / control app fails to start

[MolotovCherry]

A common theme I've been seeing is:

Users try to install, then it fails, then they install the certificate, then try to install it again and it succeeds, but when they go back to use the control app, it doesn't connect.

If you go to device manager, you may see either multiple copies of "Virtual Display" or "Unknown Device".

To solve:

1. Go to Device Manager
2. Expand Display Adapters

If you see multiple copies of Virtual Display:

1. Right click on every other copy of Virtual Display, click Uninstall device. DO NOT click attempt to remove the driver for this device
2. Leave only 1 copy of the Virtual Display. It should work fine now
3. You might have to also click "Update Driver" and choose it from the list

If you see Unknown Device, for every one you see in the list:

1. Right click on Unknown Device
2. Click Uninstall device
3. After getting rid of them all, Uninstall and reinstall driver*

Alternatively, for any of these, just uninstall the software completely and follow the instructions for manually installing the driver.

Method 2 - the manual way

1. download nefcon.exe
2. run the following command to nuke the driver:

.\nefconc.exe --remove-device-node --hardware-id Root\VirtualDisplayDriver --class-guid "4D36E968-E325-11CE-BFC1-08002BE10318"

* Make sure the certificate is installed properly before running the installer!

Ref #26

[ddpopbb3]

1. I have installed crt and driver by portable version
2. I also find two Virtual Device in the Device Manager.
3. Next I uninstalled one and leave only one copy.
4. But when I open the exe , it seems like a panic error

[MolotovCherry]

@ddpopbb3

4. But when I open the exe , it seems like a panic error

Did you accidentally delete the driver by checking the checkbox? I'd say at this point, just uninstall all of them (checking a checkbox if you see it), uninstall the software, and reinstall it.

[ddpopbb3]

@ddpopbb3

4. But when I open the exe , it seems like a panic error

Did you accidentally delete the driver by checking the checkbox? I'd say at this point, just uninstall all of them (checking a checkbox if you see it), uninstall the software, and reinstall it.

Thanks for your reply, I can run it successfully after I uninstalled and re installed !!