Windows Support Tool
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[edit] Windows Support Tool
This is a utility program that is available from your Installation CD or from the Backup tools provided with some installations of Microsoft Windows operating systems. It is generally used by administrators of larger systems , but can be used by regular users.
The feature that is not specified in the Windows Registry article is that the program REG.EXE can be used from the command line. As such it is a dangerous tool that needs to be reserved for those occasisions when a system needs a total re-build or other anomolies happen that may cause corruption of the Registry Files.
Typical problems crop up when Power Failures Occur, and / or hard drives get errors beyond what the error correcting code can compensate for.
See the external link below for the official Microsoft Web document