microsoft office professional plus 2010 encountered an error during setup
 

microsoft office professional plus 2010 encountered an error during setup.
Error 1791.The windows installer service could not be accessed.This can occur if the windows installer is not
correctly installed.Contact your support personnel for assistance.
i ran services.msc command and started the windows installer service manually.
but while running setup i received the following message.

ms.office.propus.2010.gave.the..above.error.then.b y.someone's.advice.i.renamed
.microsoft.office.help.folder.to.microsoft.office. old.and.tried.to.install.it.again.but.this.time.it .gave.
folowing.installation.error
Microsoft office professional plus encountered an error during setup.

plz help.