system
11
Hi,
just wanted you to know I found the solution. It had nothing to do with spyware or whatsoever. I have a Trust Wireless Optical Mouse 350WL. With my left button (on the side of the mouse), I start my default browser. With the latest release of the avast program I had those things (which I described in this topic) with startin my browser with that button. When I start my browser with the firefox desktop icon, there is no problem.
I uninstalled this mouse driver and installed it back again. Same problem 
But anyway, I know now it has to do with a combination of my mouse control program and avast (before the last program update of avast, there was no problem).
Thanks anyway for searching. (ps: I also re-installed my avast, just to be sure).
Kind Regards,
tpm