Description of problem:
Can not install Windows guest in virtio disk with correct driver.

Version-Release number of selected component (if applicable):
libvirt-0.8.2-20.el5
kvm-qemu-img-83-232.el5
kernel-2.6.18-259.el5
virtio-win-1.0.1-3.52454.el5

How reproducible:
5/5

Steps to Reproduce:
1.Download and install latest virtio-win rpm package on host first.
# rpm -qa|grep virtio
virtio-win-1.0.1-3.52454.el5

2.Dumpxml domain guest XML.
# virsh dumpxml win_virtio
<domain type='kvm' id='15'>
  <name>win_virtio</name>
  <uuid>6785f9df-12e9-3f5a-32b3-39de72020e12</uuid>
  <memory>1048576</memory>
  <currentMemory>1048576</currentMemory>
  <vcpu>2</vcpu>
  <os>
    <type arch='x86_64' machine='rhel5.4.0'>hvm</type>
    <boot dev='cdrom'/>
  </os>
  <features>
    <acpi/>
    <apic/>
    <pae/>
  </features>
  <clock offset='utc'>
    <timer name='pit' tickpolicy='delay'/>
  </clock>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>destroy</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
    <emulator>/usr/libexec/qemu-kvm</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='raw'/>
      <source file='/var/lib/libvirt/images/win_virtio.img'/>
      <target dev='vda' bus='virtio'/>
      <alias name='virtio0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
    </disk>
    <disk type='block' device='cdrom'>
      <driver name='qemu' type='raw'/>
      <source dev='/dev/sr0'/>
      <target dev='hdc' bus='ide'/>
      <readonly/>
      <alias name='ide1-cd0'/>
      <address type='drive' controller='0' bus='1' unit='0'/>
    </disk>
    <disk type='file' device='floppy'>
      <driver name='qemu' type='raw'/>
      <source file='/usr/share/virtio-win/virtio-drivers-1.0.1-52454.vfd'/>
      <target dev='fda' bus='fdc'/>
      <alias name='floppy0'/>
      <address type='drive' controller='0' bus='0' unit='0'/>
    </disk>
    <controller type='ide' index='0'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
    </controller>
    <controller type='fdc' index='0'/>
    <interface type='network'>
      <mac address='52:54:00:e7:7e:04'/>
      <source network='default'/>
      <target dev='vnet1'/>
      <model type='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
    </interface>
    <serial type='pty'>
      <source path='/dev/pts/5'/>
      <target port='0'/>
    </serial>
    <console type='pty' tty='/dev/pts/5'>
      <source path='/dev/pts/5'/>
      <target port='0'/>
    </console>
    <input type='mouse' bus='ps2'/>
    <graphics type='vnc' port='5901' autoport='yes' keymap='en-us'/>
    <sound model='ac97'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
    </sound>
    <video>
      <model type='cirrus' vram='9216' heads='1'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
    </video>
  </devices>
  <seclabel type='dynamic' model='selinux'>
    <label>system_u:system_r:svirt_t:s0:c772,c873</label>
    <imagelabel>system_u:object_r:svirt_image_t:s0:c772,c873</imagelabel>
  </seclabel>
</domain>

3.Create  disk image.

# qemu-img create /var/lib/libvirt/images/win_virtio.img 15G

4. Define XML and Start to install windows guest win2003_x86. 
# virsh start win_virtio
Domain win_virtio started  

5.Follow install page to install windows domain guest.

Actual results:
Can not install Windows guest in virtio disk with correct driver.
After finished copy files,guest restart. Then guest repeat at 4 steps again and again.Can not to finish install.

Expected results:
Installed should be successful.