My Laptop keeps freezing after about half an hour of running idle though it isn´t set to do it so I started thinking about viruses.
Now with "idle" I mean that I can try to create an Acronis backup or a full virus scan (at this time I am using Avast) but I will always
see the &*+?!$ thing freeze on me after about 30 minutes - so I looked for an online checker and BitDefender googles well,
which is how I ended up here... I used the online checker and it told me I had no infection, after about two minutes or so ?
HOW CAN IT BE THIS FAST ?
Meanwhile I found out that this is a typical Windows problem many people are having, though not caused by an MS program -
I am still checking around in my startup to find the cause.
Still, can anyone tell me how serious a two minute scan really is - just sheer interest, thanks. 
