Slow automatic starting and always popping up on W8.1U1

[beaver]

Hey there,

I just switched from Windows 8.1 to Windows 8.1 Update 1 and noticed even after a fresh install of the OS Teamviewer will take very long until it starts after a system restart. Only after 1 to 2 minutes after the system shows the desktop it will start and then it will always pop up with the login screen, even if I choose auto logon. It never did that before. Always started silently and very fast. Now I have to wait an eternity until the PC is ready to connect to.

Is that a known issue with Windows 8.1 Update 1 or did I do anything wrong?
However, I used the exact same driver versions than on the install before.

Thanks in advance!