DLL

aspnet_isapi.dll

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

(84 Files Available)
Last Updated

Repository Analysis

Company
Microsoft Corporation
Product
Microsoft® .NET Framework
Description
Microsoft ASP.NET ISAPI Shim DLL
Architecture
x86 (32 bit) x86-64 (64 bit) ARM64
Metadata Consensus
78/84 Files 92.9%
Higher percentages indicate stronger agreement across versions. Browse repository metadata to compare differences between variants.

Frequently Asked Questions

What is aspnet_isapi.dll?

Metadata analysis shows aspnet_isapi.dll is a Dynamic Link Library (DLL) and is described as Microsoft ASP.NET ISAPI Shim DLL .

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 Most errors occur because the DLL is missing, corrupted, or outdated.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 aspnet_isapi.dll errors?

Most errors involving aspnet_isapi.dll occur because the DLL is missing, corrupted, or outdated.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 aspnet_isapi.dll?

To install aspnet_isapi.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\aspnet_isapi.dll.
  • 64-bit Install: Place 64-bit DLL files in the System32 folder, C:\Windows\System32\aspnet_isapi.dll
  • 32-bit Install: Place 32-bit DLL files in the SysWOW64 folder, C:\Windows\SysWOW64\aspnet_isapi.dll
How do I register aspnet_isapi.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\aspnet_isapi.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\aspnet_isapi.dll".

Latest Releases

aspnet_isapi.dll
by Microsoft Corporation
for Microsoft® .NET Framework
Microsoft ASP.NET ISAPI Shim DLL
Flavor=Retail
NEW Version: 4.8.9221.0 built by: NET481REL1LAST_25H2 Verified
Product Version: 4.8.9221.0
Language: U.S. English (1033)
Uploaded: Jul 10, 2026   Size: 20.6KB
SHA256: ae150aac25c7461205ef4914bc1ee065ff0f68c49c2c3efa1c17ee727dcdeaaf
SHA1: c27cf1d2aee432cb152061ea0af7f3c44b13321a
MD5: 429cdb7a22fc1fcbdf33191a9b8d37f8
x86 – 32 Bit
IA-32, 32-bit
DOWNLOAD
aspnet_isapi.dll
by Microsoft Corporation
for Microsoft® .NET Framework
Microsoft ASP.NET ISAPI Shim DLL
Flavor=Retail
NEW Version: 4.8.9221.0 built by: NET481REL1LAST_25H2 Verified
Product Version: 4.8.9221.0
Language: U.S. English (1033)
Uploaded: Jul 10, 2026   Size: 22KB
SHA256: 5e623b640a337c354272beee337a03216bb793898cd3057edc48ba4c08cc8a22
SHA1: 8de8f486508b434bb297d3ef75d22b572859e6e5
MD5: 2c1bf5de020187235f98a80f00ad7c5e
x64 – 64 Bit
AMD64, x86-64
DOWNLOAD
aspnet_isapi.dll
by Microsoft Corporation
for Microsoft® .NET Framework
Microsoft ASP.NET ISAPI Shim DLL
Flavor=Retail
Version: 2.0.50727.1432 (REDBITS.050727-1400)
Product Version: 2.0.50727.1432
Language: U.S. English (1033)
Uploaded: Dec 13, 2025   Size: 17.5KB
SHA256: 11b72081777750c60e13ba17f19fef63cbaa294bf9ce703b11af4f0fd38d40b6
SHA1: 1e249e8bc37cd83e042b8287c5793492242e6599
MD5: 1a8b866a874060b457c30733ff32201f
x86 – 32 Bit
IA-32, 32-bit
DOWNLOAD
aspnet_isapi.dll
by Microsoft Corporation
for Microsoft® .NET Framework
Microsoft ASP.NET ISAPI Shim DLL
Flavor=Retail
Version: 4.6.1532.0 built by: NETFXREL1LAST Verified
Product Version: 4.6.1532.0
Language: U.S. English (1033)
Uploaded: Oct 11, 2025   Size: 25.2KB
SHA256: afd6b5251563574cccbf6e0213a2d804b473b667a045150fb67275c6eea05073
SHA1: 022917119e23be78788eac00d31046d88b4f78de
MD5: a8a1779c6665d93e95a9813da77b97bf
x86 – 32 Bit
IA-32, 32-bit
DOWNLOAD
aspnet_isapi.dll
by Microsoft Corporation
for Microsoft® .NET Framework
Microsoft ASP.NET ISAPI Shim DLL
Flavor=Retail
Version: 4.6.1532.0 built by: NETFXREL1LAST Verified
Product Version: 4.6.1532.0
Language: U.S. English (1033)
Uploaded: Oct 11, 2025   Size: 26.2KB
SHA256: 1fb88abbdadbcd60e4560176749ab12bd86e6113b3ee2c57feae1bc7250392c2
SHA1: 6d6005e1e5a45aaaa368f6f2cda1d8e0859d36f7
MD5: 4696fdf0ba7310ecd00cfa2e70b4e427
x64 – 64 Bit
AMD64, x86-64
DOWNLOAD