Hi Steven, I didn't notice that before, had to move right a bit, thanks for the heads up! Much appreciated! Sure, as I'm always building machines and installing Windows 7 x64 on them I can assit you often with what is working or not and update you with new KBs that are missing. Soon I'll start doing the same for Windows 8.1 x64, and perhaps also for Office 2013. So far What I've found missing (because perhaps they are quite new updates) are the following on Windows 7 x64 Professional OEM Security Updates * 2929437* 2861855* 2862152* 2791765* 2904266* 971033 Optional updates * 2574819* 2592687* 2830477 I've integrated Security essentials, .Net 4.5.2 and silverlight just fine with these commands using WinToolKit (which is a pretty good tool, using the silent install option) Silverlight-x64 /qNDP452-KB2901907-x86-x64-AllOS-ENU /q /norestartMSEInstall_x64_en_us /s /runwgacheck /o All worked like a charm, after installation, just 10 important and 4 optional updates available. Thank you!