After finish with Ubuntu 8.04 Hardy Heron installation in VirtualBox, i found this error message:
"This kernel requires the following features not present on the CPU:0:6
Unable to boot - please use a kernel appropriate for your CPU"
Step by step how to fix it:
1. Boot Ubuntu CD Installation and choose "Rescue a broken system"
2. Answer the various language and keyboard questions when you are prompted. After the installer detects your hardware it will ask you to select the root file system from a list. For me, the root partition was the first one in the list. Then select Execute a shell in [partition]. Select continueand the shell will start.
Run these commands to download the package list, install a new kernel, and remove the non-working server kernel:
apt-get update
apt-get install linux-generic
Reboot the system.
