virtualbox.org

Hello Member,
I have a Problem. When I boot from DVD and select Install or Graphical Install, then come a Message: A 32Bit or 64Bit System is required to install Debian. You have an i1586 System.

How can I change it to Bit?
My PC has a AMD64 CPU
9600GT Graphic-Card
Asus Mainboard
3GB Ram
32" Full HD Display

It would help if you tell us what VM settings you have and which Debian install DVD you downloaded and try to boot.

The newest version of Debian and the newest VirtualBox version.
I must have a 32 Bit. How can I change it from i1586 to 32Bit.

No idea about i1586, I only know about i386, i486, i586 and i686, apart from x64_86. The download site should mention which architecture you grab (32 or 64 bit).