Actually I was trying to write as short message I could, which proved wrong
...I'll correct that.I have fresh installed Windows 7 ultimate which is by now updated and KIS PURE 2.0 antivirus and firefox 11.
A month ago a friend visited me and showed me a picture of his fish tank on a local fish tank forum immediately My browser converted on my local language instead of my normal English setting that I usually use.Practically its a non English version of Firefox. I've formatted Windows 7 and I didn't have any problems until couple of days ago when my system crashed (BSOD) and Firefox started to act up again in the same manner.
I did all the scans possible but my Anitivir. program finds nothing(!) and the strange thing is that I've tried to set my network to HOME GROUP yet it stays PUBLIC and when I succeed in that then, I'm in some sort of JOINED home group and My network is named NETWORK 2.
Could it be that someone, somehow, has hacked in to my computer or something?
I did malwarebytes scan and this is what it found: