The primary concern is . Cybercriminals often embed malicious code within such tools. For instance, a malicious version of TeamViewer called "Teambot" has been discovered in the past, designed to steal user credentials and sensitive information. Many of these tools are simply untrusted binaries with no source code available, meaning you have no way of knowing what they do on your system.

If you have landed on this page, you are likely frustrated. You have probably encountered one of the most annoying limitations of TeamViewer’s free version: or the session time limit .

These errors typically indicate that the tool was not run with administrative privileges. Close the tool, right-click the executable, and select "Run as Administrator."

List all affected TeamViewer IDs (yours and the ones you connect to) .