While installing Microsoft security essenatial in Windows XP, error Ox8004FF01 is displayed. What is this error?

hi, Do you previously have an antivirus program or you do have a previous version of MSE Try first removing all remance of the previous antivirus program after that try to install the program again If you're still having problem you may try to upgrade your windows installer http://www.microsoft.com/downloads/details.aspx?FamilyID=5a58b56f-60b6-4412-95b9-54d056d6f9f4&displaylang=en