DLL

msdadiag.dll

Download and install msdadiag.dll to fix missing or corrupted DLL errors.

(42 Files Available)
Last Updated

Repository Analysis

Company
Microsoft Corporation
Product
Microsoft® Windows® Operating System
Description
Built-In Diagnostics
Architecture
x86 (32 bit) x86-64 (64 bit) ARM64 ARM (Thumb 2)
Metadata Consensus
38/42 Files 90.5%
Higher percentages indicate stronger agreement across versions. Browse repository metadata to compare differences between variants.

Frequently Asked Questions

What is msdadiag.dll?

Metadata analysis shows msdadiag.dll is a Dynamic Link Library (DLL) and is described as Built-In Diagnostics .

DLL files (Dynamic Link Library) are used by Windows programs to share code and resources. It allows multiple applications to use the same functions, improving performance and reducing redundancy. Most errors occur because the DLL is missing, corrupted, or outdated. In many cases, reinstalling the related application, repairing windows or replacing the DLL resolves the issue.

How do I fix msdadiag.dll errors?

Most errors involving msdadiag.dll occur because the DLL is missing, corrupted, or outdated. In many cases, reinstalling the related application or replacing the DLL resolves the issue. The steps below cover the most common ways to fix DLL errors.

  • Software DLLs: Fully un-install the application and then re-install the latest version. If you are not sure what software is causing problems, check available metadata for clues. If this does not solve your issue, you can try downloading and installing the DLL manually.
  • Windows DLLs: Make sure Windows is fully updated, then open Windows Terminal or PowerShell as an administrator. Repair the Windows component store so SFC can pull clean files DISM /Online /Cleanup-Image /RestoreHealth and then scan all system files sfc /scannow to automatically repair problems.
How do I install msdadiag.dll?

To install msdadiag.dll, place the DLL file in the same folder as the application’s .exe file. If you are not sure which version (32-bit or 64-bit) to use, you can safely install both. If you dont know the application or this does not work, install the DLL to the appropriate Windows system folder.

  • Software Install (Recommended): If known, place the DLL file next to the application’s .exe C:\path\to\exe\msdadiag.dll.
  • 64-bit Install: Place 64-bit DLL files in the System32 folder, C:\Windows\System32\msdadiag.dll
  • 32-bit Install: Place 32-bit DLL files in the SysWOW64 folder, C:\Windows\SysWOW64\msdadiag.dll
How do I register msdadiag.dll?

Most DLL files do not need registration, but some DLLs are COM components and must be registered to work correctly. If registration is required, open Windows Terminal or PowerShell as an administrator.

  • 64-Bit DLL: Register the DLL file regsvr32 "C:\path\to\msdadiag.dll". (Drag a DLL to automatically fill the full path).
  • 32 Bit DLL: If you are registering a 32-bit DLL on 64-bit Windows, C:\Windows\SysWOW64\regsvr32 "C:\path\to\msdadiag.dll".

Latest Releases

msdadiag.dll
by Microsoft Corporation
for Microsoft® Windows® Operating System
Built-In Diagnostics
NEW Version: 10.0.26100.8521 (WinBuild.160101.0800) Verified
Product Version: 10.0.26100.8521
Language: U.S. English (1033)
Uploaded: Jul 10, 2026   Size: 148.5KB
SHA256: 7d037bdfb4da866c9e1908e6fcd0c4cdb3952c6643b1dff68bcfcb94a4db5299
SHA1: 6571fb243e9d8a37eb3b07e2f271efe42ddd1a4a
MD5: f5303425594642bfb74aac3551843fab
x86 – 32 Bit
IA-32, 32-bit
DOWNLOAD
msdadiag.dll
by Microsoft Corporation
for Microsoft® Windows® Operating System
Built-In Diagnostics
NEW Version: 10.0.26100.8521 (WinBuild.160101.0800) Verified
Product Version: 10.0.26100.8521
Language: U.S. English (1033)
Uploaded: Jul 10, 2026   Size: 180KB
SHA256: db0f7443ac46f12d7625d3330da283dba110c0e5fbc8a2aa895505c5e57a9b21
SHA1: 495c852a1a70c67ec95761ccaa117aea950fb216
MD5: 31c60d5213726dae3ba781fcf54fb37c
x64 – 64 Bit
AMD64, x86-64
DOWNLOAD
msdadiag.dll
by Microsoft Corporation
for Microsoft Data Access Components
Microsoft Data Access - Built-In Diagnostics
Version: 2.81.1117.0 built by: (_sqlbld) Verified
Product Version: 2.81.1117.0
Language: U.S. English (1033)
Uploaded: Sep 23, 2025   Size: 116KB
SHA256: f4769b9359587c26f5b9176514f053e10fa3154da5b98634314e57047b66748f
SHA1: f00fee184341338e9613f5f8bf43db83a2786718
MD5: c8c8c5a3cd5de769d9ebf429729e569e
x86 – 32 Bit
IA-32, 32-bit
DOWNLOAD
msdadiag.dll
by Microsoft Corporation
for Microsoft® Windows® Operating System
Built-In Diagnostics
Version: 10.0.26100.1 (WinBuild.160101.0800) Verified
Product Version: 10.0.26100.1
Language: U.S. English (1033)
Uploaded: Nov 22, 2024   Size: 148.5KB
SHA256: 87477c8d8c27096eafc3794c100837acae8bfed7dca5f42eadd51668f9aa6125
SHA1: c069e2570445f0573fc473f2363070180f53c3b6
MD5: ed43ae424d0f8ef1fc52d50faf80aa99
x86 – 32 Bit
IA-32, 32-bit
DOWNLOAD
msdadiag.dll
by Microsoft Corporation
for Microsoft® Windows® Operating System
Built-In Diagnostics
Version: 10.0.26100.1 (WinBuild.160101.0800) Verified
Product Version: 10.0.26100.1
Language: U.S. English (1033)
Uploaded: Aug 4, 2024   Size: 180KB
SHA256: 2036b92da8167671548b9da3bfb68921346a3e814187f66db931d200a3984902
SHA1: 0904fa940f81bbf7325af9455044f660abefed85
MD5: 1f0c77a0469b9a50e222f1a30f11493a
x64 – 64 Bit
AMD64, x86-64
DOWNLOAD