Microsoft's internal file copying utility

Need more advanced control over file copying under Windows?  Microsoft has made available their in-house utility that was formerly restricted to internal use.  Copy files with advanced control, pause and resume copies, and copy with greater speed.

The installation process is somewhat annoying, using a custom program -- that writes to the registry -- to unpackage the downloaded file in the the installer and supporting files.  Once you've done that, read the readme.txt file to get started.

LifeHacker article

Microsoft Technet article