An error occurred while validating 80004005
Basically, if you run MSBuild and see this warning: Then the problem is Visual Studio versioning.
This means that one project was opened or created in Visual Studio 2010 and then saved or added to an existing 3.5 solution.
It shall demonstrate a listing of applications alongside with its corresponding Startup influence.
Out-of-date motorists triggers assortment problems which will end result in your computer’s sluggish efficiency. Most common examples include: 1) incomplete software installation; 2) incomplete software uninstallation; 3) improperly deleted hardware drivers, and 4) improperly deleted software applications. Hresult = 80004005 errors are very common during PC restarts that immediately follow a previous improper shutdown and recent virus or malware infection recovery.
Open your setup project file (.vdproj) in Notepad (or any other text editor).
Delete these lines at a beginning of the .vdproj file: Build again - the error is gone.
I installed Visual Studio 2010 and converted the solutions to that version.In many instances, a An Error Occurred While Validating.Hresult = 80004005 error code could have multiple An Error Occurred While Validating. Each hexadecimal code denotes a different memory address location that loaded instructions when the error was generated.Both of the reasons I found are already in other answers, but they are in separate answers and not fully explained.So, hopefully this will combine the possibilities and give good means of debugging each.