Hi,
This article was released a couple of days ago and can be good to know about.
From the MS KB:
“A PXE enabled Distribution Point will generate a number of files under C:\ProgramData\Microsoft\Crypto\RSA\S-1-5-18 for each PXE request that it services on the network. This occurs whether the device sending the PXE request has a Task Sequence deployed to it or not. The generation of files will continue and may consume available hard disk space.”
For more information see the whole article: http://support.microsoft.com/kb/2713467
When I entered this folder on our SCCM 2012 server it asked for administrative permisions and I clicked OK. After that the PXE service did not work. Remember to check if system have full permisions to this folder if your PXE (WDS) service stops working after you have entered the folder.
/Kasper