KVM is the default virtualization system for Ubuntu 9.10:
"The default virtualization technology supported in Ubuntu is KVM, a technology that takes advantage of virtualization extensions built into Intel and AMD hardware. For hardware without virtualization extensions Xen and Qemu are popular solutions." (http://doc.ubuntu.com/ubuntu/serverguide/C/virtualization.html)
KVM is the default virtualization system for Ubuntu 9.10:
"The default virtualization technology supported in Ubuntu is KVM, a technology that takes advantage of virtualization extensions built into Intel and AMD hardware. For hardware without virtualization extensions Xen and Qemu are popular solutions." (http:// doc.ubuntu. com/ubuntu/ serverguide/ C/virtualizatio n.html)
This would explain why it's installed by default.