Currently I am using the Avast Scanner and I also install deepfreeze. I haven't encounter any disadvantages yet because I am still new in it. Anyway I will try yours(the free one).
Schatzi try to use deepfreeze. Any virus comes in to your PC will be wipe out everytime you boot up. But be sure to disable it if you're going to install any software or you want to have any changes of your properties.
Is this a free software? I?ll search that in google. I am not so contented with my avira antivir. If I found another free virus scanner, then I?ll check if which is better.