windows installer already started but vista installer cannot be accessed
http://support.microsoft.com/mats/Program_Install_and_Uninstall
http://social.technet.microsoft.com/Forums/en/w7itproappcompat/thread/eae8a280-8afe-4719-b4c6-98d25a207a6a
windows installer service could not be accessed
June 7, 2012
