A unstable local IP assignment can cause connection timeouts.
Error 120259 is a generic connection failure code. It indicates that your TeamViewer software tried to reach the TeamViewer routing servers, but the connection timed out before it could establish a link. Common Causes teamviewer 120259 download free
TeamViewer needs specific ports open to communicate with its routing servers. A unstable local IP assignment can cause connection timeouts
Many users hunt for specific builds thinking they can avoid the “commercial use suspected” popup. Unfortunately, that detection is mostly handled on TeamViewer’s servers, not in the client software. Even if you install an old build, the server will still limit your session time if it detects business usage. teamviewer 120259 download free