I think, this problem happened because you are installing Ubuntu from the ISO image on your physical hard drive.
Here is the way around this problem. when you get to the option to unstall Ubuntu, press F4
and choose Safe graphics mode.
then choose the first option on the menu:Try Ubuntu without any change to your computer.
If you still get the same problem do this:
At the prompt, press F4
and select "Safe graphics mode
then press F6
Modify the following boot line:
"Boot Options seed/ubuntu.seed boot=casper initrd=/casper/initrd.gz quiet splash -" Delete the part that says
"quiet splash "" -" and replace
it with "vga=791 noreplace-paravirt"
That will make Ubuntu boot onto the GUI. After logging into Ubuntu Interface you should be able to see an installation folder on the desktop:
Click on the Install folder. The installation wizard should come up:
Select the language and click Forward. Next Choose your location:
Choose your city, and click Forward. Don't worry if the time zone is not OK, you can change that later when you login to Ubuntu.
Next, you will need to choose your Keyboard layout, if you are in the US, mostly all your options will be the default. If you are not in the US, choose your settings accordingly. Click Forward.
Next, you will need to prepare the disk space, remember that you chose to use 10 GB of hard disk space for this virtual machine, so select the default option, Guided "" use the entire disk.
Click Forward. Next, you will have fill out, your name, your username, password, and Computer name":
After you have entered the info, click on Forward. Next, you will get a summary of the installation. Click Install to begin the installation:
The installation should start.
After 20 "" 30 minutes, the installation will finished, and will ask you if you want to reboot. At this stage Ubuntu is installed on your computer permanently.
Click on Restart now. Now Ubuntu should be installed and ready to be used on your virtual PC