Remember - This is a public forum so never post private information such as email or phone numbers!Ideas:microsoft essentials cannot not install windowsdid not pass genunine validationPrograms you are having problems with Error messages Recent changes you made to your computer What you have already tried to fix the problem 1 person needs an answerI do too

check this outhttp://www.google.co.uk/search?q=microsost+essentials&rls=com.microsoft:en-gb:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7GGLT_en&redir_esc=&ei=2UjoTNjnPMqzhAeBh_AP

that means that unfortunately your copy of windows is pirated. and you cannot install microsof security essentials.where did you buy the computer?

Take a look at: Genuine Microsoft Software andHow to TellMicrosoft® Security MVP, 2004 - 2010