after a few days of testing, parts of my pc suddenly were locked.
Could not start applications anymore, nor start programma’s : START/PROGRAMMS etc…
This problem still existed after a reboot.
So I uninstalled the firewall and because I read about problems doing this I used Revo Uninstaller which did a fine job.
Well things were back to normal, when BOclean started alerts that userinit.exe contains a trojan!
I went searching and found that a lot of users are having this problem at the moment and that this probably is a false alarm!