ZPM and DAU user accounts

Question regarding ZENworks 11.2.4 mu1 and patch management on a Windows 7 Pro, 64-bit computer.

I am noticing now that when I create a bundle and distribute the bundle containing patches, that there are accounts/folders created under c:\windows\users. The accounts/folders are called DAUx-xxxx(where x is a number). What are these? These accounts do not appear to go away when the bundle has completed. I was previously on 11.2.3a and did not have any of these account/folders created.

Thanks.

Scott