SQL SERVER – FIX : ERROR : is not a valid Win32 application. (Exception from HRESULT: 0x800700C1)

Just a day ago, one of my friend sent me email requesting help with following error:

is not a valid Win32 application. (Exception from HRESULT: 0x800700C1)

In fact this is not SQL Server error but it is of .NET application. The solution of this error is just changing configuration of IIS7.


Go to IIS.
Click on Application Pool.
Look for your web application in application pool.
Go to Advanced Settings by right clicking on previously selected application pool.
Enable 32-Bit Applications by checking it.

Reference : Pinal Dave (https://blog.sqlauthority.com)

SQL Error Messages, SQL Server Security
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6 Comments. Leave new

  • This is cool for the information. I have iis 5.0 installed. Can you let me know any solution with this. Probably I think (not sure) that this error is from IIS. Instead this is from .NET framework’s Dr. Watson’s debugger. And this is a link from microsoft website for the above error.

    Last but not least. I am not an expert in english grammer. Can you please check the grammer mistake on the first line Pival. I noticed this issue in one of my grammer books that I read these days.

  • Hi Dave,

    I followed the same steps but still getting the same error that “is not a valid win32”

    please help

    Uday Nayak

  • Thanks very much for your information..

  • please i still can not locate IIS manager in my Administrative tools. Please how can i get it there. thanks


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