system hangups

Hallo, i have trouble with SuSE distributions 10.0, 10.1 and 9.3. Having them installed on the system, i get a hangup, nothing is working anymore, without a syslog entry. It is caused by different actions, i cannot specify, for example running BOINC (http://boinc.berkeley.edu). I checked most of the hardware... i don't know how to go on to find out what the problem is. do you have any hints? hwinfo: http://lfsle.swabian.net/hardware should i try a live cd? thanks Paul