Just posted this in response to a boilerplate response from DJI Tech support:
"I am running Windows 10 Pro x64 Version 1809 Build 17763.348 on my laptop. I have turned off ALL antivirus software ALL driver signing verification as well as Windows firewall on both Public and Private networks. I uninstalled the program and scrubbed the Registry from all DJI references and I still get the notification when I attempt to reinstall the program. A copy of the program I had previously installed on my desktop has also stopped working. The general thinking from the DJI forums is that the code signing certificate from DJI Assistant 2 has been revoked and must be renewed before the software can be used again. If you allow this problem to persist people are going to be flying with outdated code and there are going to be crashes that DJI could be held responsible for.
It looks like the problem is on your end. I suggest that DJI resolve the matter before it starts impacting sales or drags you into arbitration or the courts. People are posting about this problem ALL OVER THE WEB! I have a marketing background and I know what I am talking about. This issue can hurt DJI seriously. Fix it!"
Hope they listen!