Hi Tom,

From http://msdn.microsoft.com/library/default.asp?url=/library/en-us/ddtools/hh/ddtools/checked_3lv7.asp

The checked build (or debug build)
The purpose of the checked build of Microsoft Windows is to make identifying and diagnosing operating-system-level problems easier. The checked build differs from the free build in the following ways:
Many compiler optimizations (such as stack frame elimination) are disabled in the checked build. Disabling such optimizations makes it easier to understand disassembled machine instructions, and therefore it is easier to trace the cause of problems in system software.
The checked build enables a large number of debugging checks in the operating system code and system-provided drivers. This helps the checked build identify internal inconsistencies and problems as soon as they occur.
...
Because the checked build contains fewer optimizations and more debugging checks than the free build, the checked build is both larger in size and slower to execute than the free build. As a result, the free build is used in production environments unless it is necessary to use the checked build to identify serious problems.



>Hello all....
>
>In the MSDN disks.. what is the differrence between a regular disk and the disks labeled....
>
>Checked - Debug build
>
>Just curious.
>
>Thanks