There is no official or widely documented tool named vsprecleanvs.exe vspreclean.exe specific to Visual Studio 2012. It is highly likely that this term refers to the Visual Studio Uninstaller (sometimes associated with vs_uninstall.exe vs_preclean

Have you encountered this exact error string in a build log? If so, double-check the exact wording — it may help trace whether it’s from a third-party add-in or a custom build script referencing “vspreclean” as a variable or target name.

While not a "feature" in the sense of a coding tool, it refers to an administrative utility:

Failed to enable profiler. Exclusive mode already active by another process.

• VS_
• COR_
• PROFILER_
• VSPERF_

How to use it (Standard Procedure):

If you have the executable, the "proper post" usage is generally as follows:

2. Anti-Virus or Indexing Services

Some security software temporarily locks newly generated executables or DLLs for scanning, causing the pre-clean step to see them as exclusively held.

• Disable multi-processor builds temporarily (/m:1) or ensure targets are properly isolated.

• vsinstr.exe (instrumentation)
• vsperfcmd.exe (profiling controller)
• Or a third-party tool unrelated to VS2012