So I had Norton 360 5.0 (was unfortunately expired), but as I do not need the additional functions I switched to Norton Internet Security 2012. The performence and virus detection are really first class! I do not want Virus Scan software that you realize or even ausbremmst the Pc! With Norton Internet Security 2012, I am completely satisfied. I had also tested GData 2012 Kaspersky 2012, and various other Internet Security's, but none came remotely ran at Norton! With Norton are you doing nothing wrong! Another tip: Stay away from GData! Your saves you trouble and the PC does not creep in front of him! I Win 7 64 bit, 8GB RAM, Geforce GTX 570, i7 2600K. Kaspersky bremmst even more than the previous versions, but not as extreme as GData! Top Always load the trial down and check their paces. Before now the Gdata I will go before Beführworter about me you still say, I am not Computerleie! I know what I'm doing and my PC is optimally configured and set is cleaned regularly and other Virus Scan software I no longer have it as no residues or residues! The test results (GData) Regulations Stiftung Warentest have long been worth nothing because they are not neutral enough to what was already proven!