When you try to install Windows XP Service Pack 3 (SP3) using WSUS, it may fail with a 0x8007f00d or 0x8007f02b error. This can happen if the workaround for MS09-010 was applied to the client machines adding deny permission to file C:\program files\windows nt\accessories\mswrd8.wpc.  This causes the WSUS installation to fail because we’re unable to access the file and update it.  The resolution of course is to grant permission to the file.  The easiest way to do this is via a batch file, which is what we did, containing the following line: Echo y| cacls %programfiles%\windows nt\accessories\  /T /P Everyone:C

Source:→ WSUS blog