Problems with ATIO Disk Benchmark?

If you're getting the following:

"cannot open file benchtst.$$$"

You're probably running Windows Vista, Windows Server 2008, or Windows 7.  You probably have UAC running normally as well (good for you!).  To get around it, right click on the application binary (or your shortcut to it) and select "Run as Administrator."  This will give you the permissions you need to create the initial file for the benchmark to run.