Bernhard...keep in mind I am no expert but I have managed to get 3.2 and 4.0 working(Not on a DELL) but here are some thoughts:
1) Look thru your BIOS settings I found I had to tweek them to get my system installed. 2) Did you run 3.2 on this machine and are now upgrading to 4.0. If not I would again look at your BIOS. 3) When you do the reinstall are you able to wipe the old install? During the install process you can wipe out the old install. I have had to do this a few time. You are prompted during install...take your time and look at all options during install. Thats the best I can offer...good luck. -- You received this message because you are subscribed to the Google Groups "qubes-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-users+unsubscr...@googlegroups.com. To post to this group, send email to qubes-users@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-users/8ae69d2d-a799-47ab-b016-ddfa334be16d%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.