I think the main issue of the BTC stolen was not setting up a password in my wallet, because the software does not force you to do so. Atm I am just tired of all these security procedures in order to keep your wallet save. As I already said, I now use blockchain.info as my wallet and activated every security settings provided by the mentioned wallet. For me the effort is to high to keep your wallet save. I hope now it is^^

If ever again some BTC get stolen from my wallet, I will try a linux live cd or I quit the adventure.

In the latest Ct (a highly esteemed computer magazin from Germany) Microsoft Essentials was the best free virus protection on the market, before that I used AVG, but was not satisified at all.