Hi,
I've red a lot for this problem on the net, so first i am going to describe it, then explain the troubleshooting steps i have taken.
So i have SCCM 2012 and i am creating Build and Capture task sequence. I am using the default x64 build of SCCM 2012 R2 and i have injected the drivers in the image! I have configured everything and started VM with pxe to deploy the os. The task sequence started and then instantly failed on Preparing network connection.
The next time i rebooted and got to the TS i presed F8 and was able to view the smsts.log In there i found the following error:
Failed to download pxe variable file. Code (0x80004005) Now correct me if i am wrong, but error 0x80004005 is Access Denied!
Next i tested my network with ipconfig and i was able to receive answer. I have ip assigned, but interesingly enough i don't have ping to my sccm 2012 server.
So i've redistributed the os, re-created the ts and the same result. Any ideas would be appritiated :)