When you try to install Microsoft Security Essentials on a computer that is running Windows XP, you receive the following error message:
"0x8004ff56: The Security Essentials Installation Wizard is missing a Filter Manager rollup package needed to complete the installation. To continue installing Security Essentials, you must first download the required package."
This issue may occur if you are running Windows XP Service Pack 2 (SP2), or if you have not installed the Forefront Client Security Filter Manager QFE for Windows XP/SP2.
To resolve this issue, install the Forefront Client Security Filter Manager QFE for Windows XP/SP2. To do this, follow these steps: