I am doing an unattended install for Windows XP Professional. I have already slipstreamed every hotifix with nLite, then at first login it installs the odd ones nLite cannot slipstream. It also installs the "WindowsUpdateAgent30-x86.exe" at first login using the following switches which do work... /wuforce /silent /norestart This works because when I try to manually install the Windows Update Agent after this, it tells me its already installed. The problem is I am still missing something else because when I visit Windows Update it says... Does anyone know of an addon for nLite that fixes this? I even tried adding the files to $OEM$\$$\system32 but that doesn't work. it seems to add the files wuauclt.exe and wuaueng.dll among others. I am sure the addon used to be called wucab or it was something to do with cab files. Really I just want an addon, thats the simplest way. I know its possible because when I use an addon pack (completely updates Windows) this message never appears on Windows Update so there is some way to do this with an addon. Thanks in advance, there is always an answer here.