their is prompt appear is say Microsoft Client Protection has been found.Please remove that product and rerun the setupWhat is it mean do i remove my anti virusprogram microsoft security essentials to install windows defender1 person got this answerI do too

Microsoft Security Essentials includes the functions of Windows Defender, so it doesn't allow a separate Windows Defender installation.Boulder Computer MavenMicrosoft Most Valuable Professional

You should NOT replace Windows Defender with Microsoft Security Essentials, Windows Defender is Anti-Spwyare only but Microsoft Security Essentials is Anti-Spyware+Anti-Virus. Windows Defender is inside Microsoft Security Essentials. You should uninstall Windows Defender when you have Microsoft Security Essentials

well guys thanks a lot for your help

thanks guys

You don't have to uninstall Windows Defender to install Microsoft Security Essentials. Microsoft Security Essentials automatically turns off Windows Defender.Boulder Computer MavenMicrosoft Most Valuable Professional

In Windows Vista and Windows 7 , it would turn off automaticly. In Windows XP it recommend to uninstall it just in case as long as it is external application in Windows XP. It will turn off in Windows XP but uninstall it would be recommended.