Gentlemen, I'm an avid reader of the site and have contributed very little because the knowledge base here is far greater than mine. I've learned a lot over the years and would like to thank those for their contributions and time. I would like some assistance with a problem injecting drivers into the wim file for windows 8 x64 WMC Retail and 8.1 x64 WMC Retail. When I install the drivers that are current on my operating system, Win 8.1 x64 WMC Retail both retail key activated then I have a problem with the install. The problem is that after I inject the drivers and do a clean install, the USB keyboard and mouse don't respond to input. The indicator on the key board isn't lit up, which means no power. I plugged an old keyboard in that has the DIN plug and it responds. I get through the install set-up screens using the old keyboard. Then I reboot but the USB keyboard and USB mouse still don't respond. Seems the default drivers from windows don't load either. Everything goes well with a clean install without adding the drivers to the wim file. It doesn't activate until I install the recent drivers. The keyboard and mouse keep working normally with the same updated drivers that I inject to the wim. So my question is, should the drivers be installed else where, like boot wim or the PE wim? or all three places or is this a different issue? Thanks in advance.