Latest version of Team Viewer makes my system have a strange lag at startup.
I had a strange lag with my system and I scrathed my brains out to find out who is responsable... and I found out!
The symptoms: Windows 7 Pro SP1 (without updates, using official MS iso) goes into desktop, the network symbol have the rotating circle goin on for 20 seconds or so and in the mean time the system hangs if you try to do something like opening control panel > network, surfing with the web browser or similar tasks.
The trick to solve the issue is to uninstall team viewer and after a restart the network icon will go straight to a clear "all ok" network symbol, and everything will work.
I don;t know if any logs will help, but I will attach if requested. This also happened on other PC's.