How to Disable Driver Signature Enforcement in Windows


– Windows cannot verify the digital signature for this file. (0xc0000428)
– Windows requires digitally signed driver OR Digitally signed driver is required.
– Digital Signature Not Found.
– Cannot load or install an unsigned driver.
– Cannot run (execute) an unsigned software (program).
– Windows did not find a Microsoft signature associated with the software package you want to install.

Solution: Disable Driver Signature Enforcement in Windows:

Open “Command Prompt” in administrative mode

bcdedit /set testsigning on

Restart your computer.

(Set off to enable)

Asterisk: tried to authenticate with nonexistent user ‘cxpanel’


If you’re not planning on using isymphony, uninstall the module, then disable the service with:

chkconfig iSymphonyServerV3 off

Then restart asterisk and those errors should go away.


Settings -> Asterisk Manager Users over on the right is a user called cxpanel. You need to click on it, bring it up, change nothing, and click “submit changes” on the bottom. This will write the cxpanel user details in the proper config file.