So far I had always on my PC the free AVIRA version or the previous version of GData. GData has mostly malicious software and internet cases detected where Avira announced nix. Now I switched on all devices to the new GData 2015. For this, the old software must always be removed beforehand with an extra tool! The tool is available on the HP of GData download. After the installation works completely painless and fast. Internet connection during installation is necessary because the current virus data and registration activation takes place during the initial installation. After registering online you get an access code via email and can unlock the other two devices with this code without re-registration. The software runs in the background and logs rarely if new programs need to send data to the Internet or an attack is detected. A one-time release then remembers the program and in the future is peace. In the first 4 weeks of at least 3 harmful attacks have already been reported and blocked. Good Thing. I am fully satisfied with the software. The speed of the other programs have not slowed down by the security software. There have been observed no adverse effects on me.