msdia90.dll - Analyze and How to Fix Errors

⚠️ Important Notice: Discover information about msdia90.dll, its role in Windows systems, and how to troubleshoot related issues. Manually replacing system libraries can brick future Windows updates or cause critical system failures.

Architecture:	32-bit (x86)	Compatible with 32 and 64-bit Windows
Creation date	19.04.2011 05:52:35
File version	9.0.30729.6161
Antivirus scan	✅ Clean	No viruses detected.
Digital signature	✅ Have signed	File have signature, it is original file.
Hash Integrity	✅ MD5: Verified	File Hash protection is missing.
File size	0.6 Mb.	670032 bytes.

Hashes:

MD5: e9eaf9a3f0b6f1a663dea7c33324abf1 ✅
SHA-1: 50d9baa3f13350a38e6faf6b7ed9c0aba5260b3a
SHA-256: 66faff185c94cfba455b16bc3ecfe72c68f21f4caa3ff443f8098709b7ce888d
SHA-512: ae3ec0558a7ad4440fa054cb201cf47b82c22dc501cd2d8a9f80dd1136207804d28c421c59ec0e08d09fe168b0c15fade0c44e0eb52a3e792adebc0a24fbc41c

Digital file signature msdia90.dll ✅

✅ This file is compatible with 32-bit Windows and can run on ✅ 64-bit Windows (via the WOW64 subsystem).

How to fix errors msdia90.dll without downloading files.

The msdia90.dll file is a Microsoft system file often placed in the root directory of a drive (usually C:\ or D:\) by the Microsoft Visual C++ 2005 Redistributable package due to a known installation bug.

You do not need to download anything to fix this. You just need to move the file to its correct system folder and register it.

Step 1: Move the File to the Correct Directory

1. Locate the msdia90.dll file in your root drive (e.g., C:\msdia90.dll).
2. Right-click the file and select Cut.
3. Navigate to the following path on your computer: C:\Program Files\Common Files\Microsoft Shared\VC
4. If you do not see a VC folder inside Microsoft Shared, create one:
   • Right-click inside the folder -> New -> Folder.
   • Name it VC.
5. Open the VC folder and Paste the msdia90.dll file inside it.

Step 2: Register the DLL File

Windows needs to know the file has moved. You must register it using the Command Prompt.

1. Press the Windows Key, type cmd, right-click Command Prompt, and select Run as administrator.
2. Copy and paste the following exact command into the black window:

   regsvr32 "C:\Program Files\Common Files\Microsoft Shared\VC\msdia90.dll"

3. Press Enter.
4. You should see a popup window stating: "DllRegisterServer in ... msdia90.dll succeeded."
5. Click OK and restart your computer.

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📊 Diagnostics Tool: Verify Your msdia90.dll File

Worried that the file on your PC has been modified by malware? Drop it into the form below. Our script will verify its file size, cryptographic hash (MD5/SHA-1), and check for a valid Microsoft digital signature.

Connected files:
KERNEL32.dll
├── ADVAPI32.dll
└── OLEAUT32.dll
Other versions:
️ msdia90.dll 9.0.30729.6161 64-bit (x64)
Microsoft Corporation