What is “MSDIA80 DLL” And How To Solve?

Visual C++ and other Windows-based programmes rely on the msdia80.dll system file. For the C, C++, and CLI programming languages, Microsoft offers a commercial IDE known as Visual C++.

Included are tools for running and debugging C++ code, including that written for Microsoft’s Windows API, DirectX API, and.NET Framework. Dynamic Link Library is the full name for this file type.

It’s a collection of useful code and libraries that may be imported into other Programmes. Since it is a read-only file, numerous Programmes can use it without conflicting with each other.


Many Programmes rely on a number of DLL files to function properly. If you remove the DLL, the Programme may not function properly.

Where do You Even Start With Fixing that DLL File? Toss it?

Just as we mentioned before, it is not advised that you remove any DLL files from your PC. Simply explained, they are bits of code already installed on your computer that may be used by programmes as needed.

If’ msdia80.dll’ is on more than one drive, it needs to be relocated and registered. In registering the file, you inform Windows that you have successfully placed the file in the specified location and that Windows may now access the file at any time.

You can either accomplish what I just said, or you can install two different Microsoft programmes. Both approaches will be cycled through.

Method 1: Changing the Location of the DLL

We’ll copy the DLL file from the drive’s root directory to the VC folder on your boot drive (boot drive is a drive where your operating system is installed).

  1. To open the File Explorer to the directory where msdia80.dll is located, press the Windows key plus E.
  2. The DLL file can be removed by selecting “Cut” from the context menu.
  3. Now open the following file location:

C:\Program Files (x86)\Common Files\microsoft shared\VC

If your OS is stored on a different drive, you can alter the local drive in the path name.

4. To paste text, right-click the blank area and select “Paste.” A UAC prompt requesting for permission to complete the transfer may appear. To proceed, please click “Continue.”

5. The file must be registered once the relocation is complete. To launch the command prompt as an administrator, press the Windows key plus S, then type “command prompt” into the search box.

6. At the prompt with the elevated privileges, type the following command. Be sure to use two quotation marks.

regsvr32 “C:\Program Files (x86)\Common Files\microsoft shared\VC\msdia80.dll”

7. After the restart, see if the issue still exists.

Method 2: Microsoft Visual C++ Redistributable Package Setup

We can try installing Microsoft Visual C++ Packages on your computer if the first option is too time-consuming or doesn’t do the trick. We’ll be installing two separate packages. Be sure you have access to the internet and administrator rights before attempting this fix.

  1. To access the ATL Security Update for Microsoft Visual C++ 2005 Service Pack 1, launch your web browser.
  2. Download the files named “vcredist x86.exe” and “vcredist x64.exe” from the list. Simply double-click the downloaded executables to begin the installation process. Always run them as an administrator by selecting the option from the context menu.
  3. These two packages must be installed before you can access the “Microsoft Visual C++ 2005 Service Pack 1 Redistributable Package MFC Security Update” package.
  4. From the drop-down menu, choose ‘vcredist x86.EXE’ and ‘vcredist x64.EXE’; then, save the files to a convenient location. Get these executables downloaded, then execute them and sit tight as they set up. Doing so requires that you run them as an administrator (right-click and select “Run as administrator”).
  5. When you’ve finished installing all of the packages, reboot your computer to see if the issue has been resolved.