On the windows machine install
Python 2.7.3 for Windows.
http://www.python.org/ftp/python/2.7.3/python-2.7.3.msi
Add python route into the PATH variable
Install Python for Windows extension (pywin32) version 216 for Python 2.7
http://sourceforge.net/projects/pywin32/files/pywin32/Build216/pywin32-216.win32-py2.7.exe/download
Download ovirt guest agent source code
https://github.com/oVirt/ovirt-guest-agent/archive/master.zip
uncompress the code and copy the folder ovirt-guest-agent to a localitation like C:\ovirt-guest-agent
Open the file ovirt-guest-agent.py and edit the line
AGENT_CONFIG = ‘/etc/ovirt-guest-agent.conf’
to
AGENT_CONFIG = ‘C:\ovirt-guest-agent\ovirt-guest-agent.conf’
finally
open a msdos console
cd C;\ovirt-guest-agent
python OVirtGuestService.py install
net start OVirtGuestService