Knowledgebase
"Bad Image" 0xc0000020 when starting LockDown Browser

bad image

If you receive the above error when starting LockDown Browser, it's likely because of over aggressive security software wrongly determining that LockDown Browser is a threat. As a result, the startup of LockDown Browser is interfered with, and the installation of LockDown Browser may even be corrupted.

We recommend the following steps:

1) Uninstall LockDown Browser from your computer.

2) Reinstall LockDown Browser using a copy of the installer downloaded from your institution's unique LockDown Browser download URL.

3) Make sure you only have one major anti-virus security software program installed on your computer.

4) In the one anti-virus program (if any) be sure to whitelist "lockdownbrowser.exe".