VC Compiler Error Spawning solution

VC recently used some high frequency, encountered problems are also more up.

For example, Friday compiled the original code, was good, but suddenly the following error occurred:

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Cannot start tool.
The operation completed successfully.
Cannot start tool.
Error spawning ' vcspawn.exe '. The build could is performed.

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Online Search, there is a solution (paste):

Add (or modify) environment variable ComSpecfor machine (Add method of environment variable I don't wordy:), set it to:C:/windows/system32/cmd.exe. Then restart VC, everything is fine. PostScript: The author is also doing an edit environment variable and registry app when accidentally put the COMSPEC environment variable to delete, pain ah.