Microsoft Security Essentials for XP 1.0.1959
please download the file without using your download manager and check your firewall settings. Firewalls and download managers usually block HTTP referrers, which are required by some download mirrorsکد:http://download.microsoft.com/download/A/3/8/A38FFBF2-1122-48B4-AF60-E44F6DC28BD8/mssefullinstall-x86fre-en-us-xp.exe
or
http://69.4.238.253/~download/files/mssefullinstall-x86fre-en-us-xp.exe