yes, this worked, removed this 2 files and now everythin works fine. I have no problem in the last 10 hours. (Before I had to reboot every 3 hours)
/Library/Caches/com.apple.LaunchServices-xxx501.csstore
/Users/HOME/Library/Preferences/com.apple.LaunchServices.plist
I did Did migrate my data over from another (non-Intel) powerbook....