Hi,<br>I installed Fedora 12 x86-64 onto Hp Z800 workstation, had a problem with software updates so used <br>$su -c &#39;yum update&#39;, <br>problem was fixed. Installed Adobe Acrobat Reader. Downloaded few other programs but did not install them. Then, the screen froze. Tried Ctrl-Alt-Del to restart, didn&#39;t work, so reset the machine from the power button. Then someting very interesting happened - machine went into a loop mode, started, failed to boot fedora, shutdown, restarted by itself, failed to boot fedora, shutdown...etc about six times. Then I just shut the machine off. Before fedora could be loaded, the pc just shutdown in each case. At start tried pressing F10 but didn&#39;t work.<br>
<br>Has anyone else experinced a similar problem?<br><br>Nermin<br>