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iertutil.dll - Analyze and How to Fix Errors

★★★★☆ Verified File (27.08.2026)

⚠️ Important Notice: Discover information about iertutil.dll, its function, and how to handle errors related to this DLL file. Manually replacing system libraries can brick future Windows updates or cause critical system failures.

Architecture:other️ Not detected
Antivirus scan✅ Clean No viruses detected.
Digital signature🟡 Not signedSignature missing. The file may have been modified.
Hash Integrityℹ️ UnverifiedFile Hash protection is missing.
File size140.2 kb.143613 bytes.

Hashes:

MD5: ef9a4761c9d0cbed5669660d0f2b70e4
SHA-1: 18860c27ad91fc7bcf8fba701297e4860dfb1c86
SHA-256: 468614e0836796faefd422cab4a38cc4022735718898e11dcc1b84a59c7f3bd7
SHA-512: ad0cc254a8a5bd225bdd79a245aefcbf1c7a0959d557b50f1a47f85dda483ab55ba41f2866edd509278ef211b949986d580bf3d2a0333928731d91b72003dca3

Overview

The iertutil.dll file is a critical component of Windows Internet Explorer and runtime utilities. Errors usually occur due to registry issues, malware corruption, or failed Windows updates. You can fix this error completely without downloading files from third-party websites.

Method 1: Run System File Checker (SFC)

Windows has a built-in tool to repair missing or corrupted system files automatically.

  1. Press Windows Key + X on your keyboard.
  2. Select Command Prompt (Admin) or Windows Terminal (Admin).
  3. Type sfc /scannow and press Enter.
  4. Wait for the scan to reach 100% completion.
  5. Restart your computer.

Method 2: Run DISM Tool

If the SFC scan does not work, the DISM tool will repair the Windows system image.

  1. Open Command Prompt (Admin) as shown in Method 1.
  2. Type DISM /Online /Cleanup-Image /RestoreHealth and press Enter.
  3. Let the process finish completely (it may take several minutes).
  4. Restart your PC.

Method 3: Re-register the DLL File

If the file exists but Windows cannot read it, you can re-register it in the system registry.

  1. Open Command Prompt (Admin).
  2. Type regsvr32 iertutil.dll and press Enter.
  3. Click OK on the confirmation pop-up window.
  4. Restart your computer.

Method 4: Use System Restore

If the error started recently, you can roll back your system to a previous working state.

  1. Press Windows Key + R, type rstrui, and press Enter.
  2. Click Next in the wizard.
  3. Choose a restore point dated before the error started appearing.
  4. Click Next and then Finish to start the restoration.

To help find the exact solution, please let me know:

  • What version of Windows are you using?
  • What is the exact error message text on your screen?
  • Does the error happen during startup or when opening a specific app?

📊 Diagnostics Tool: Verify Your iertutil.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.

Other versions:
️ iertutil.dll 11.0.19041.5915 32-bit (x86) | ️ iertutil.dll 11.0.19041.5915 64-bit (x64)
Similar files:
️iertutil.dll.mui