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accesscontrol.dll - Analyze and How to Fix Errors

★★★★★ Verified File (27.08.2026)

⚠️ Important Notice: Manage access control settings and permissions with accesscontrol.dll. Essential for system security and user management. 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 date25.03.2009 06:47:31
Antivirus scan✅ Clean No viruses detected.
Digital signature✅ Have signedFile have signature, it is original file.
Hash Integrity✅ MD5: VerifiedFile Hash protection is missing.
File size21.9 kb.22464 bytes.

Hashes:

MD5: eb7a540d0d2e28f6bf524d2cdbe0f478
SHA-1: 76204991c60913cffeba5595033c4f79e1e89bd8
SHA-256: ef4b548b27a6edab3bcb25cff0598918c645795850d62f232909dee851e04c6d
SHA-512: 947132d07f7875dc99fbe8a87757f6efee0a8c6271f8a3bac6747f9f4f60ed7e203e28a588db8c55ee898ba8f3dcf640f6562c49c45d6c6d8fdbe2d2309b9984

Digital file signature accesscontrol.dll

Digital signature: signed.
Publisher: Mozilla Corporation
Issuer: DigiCert SHA2 Assured ID Code Signing CA
Encryption algorithm: SHA256
Time stamp: May 25 14:24:36 2022 GMT
Signature status: valid

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

To fix the accesscontrol.dll error without downloading any files, you need to repair the existing system files or re-register the library. DLL errors usually happen because of file corruption, registry mismatches, or malware interference.

1. Run SFC and DISM Scan

Windows has built-in tools to find and replace corrupted system files automatically using your local system image.

  • Press Windows Key + X and select Terminal (Admin) or Command Prompt (Admin).
  • Type sfc /scannow and press Enter.
  • Wait for the scan to finish.
  • Type DISM /Online /Cleanup-Image /RestoreHealth and press Enter.
  • Restart your computer.

2. Re-register the DLL File

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

  • Open Command Prompt (Admin).
  • Type regsvr32 /u accesscontrol.dll and press Enter to unregister it.
  • Type regsvr32 accesscontrol.dll and press Enter to register it again.
  • Restart your PC.

3. Check for Windows Updates

Missing system updates can cause dependency conflicts with DLL files.

  • Open Settings (Windows Key + I).
  • Go to Windows Update.
  • Click Check for updates.
  • Install all pending updates and restart your device.

4. Perform a System Restore

If the error started recently, you can roll back your system to a time when it worked perfectly.

  • Type Create a restore point in the Windows search bar and open it.
  • Click the System Restore button.
  • Choose a date before the error started appearing.
  • Follow the on-screen instructions to finish the process.


📊 Diagnostics Tool: Verify Your accesscontrol.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:
ADVAPI32.dll
├── KERNEL32.dll
├── USER32.dll
└── AccessControl.dll

Similar files:
️system.security.accesscontrol.dll | ️system.io.pipes.accesscontrol.dll | ️system.threading.accesscontrol.dll | ️system.io.filesystem.accesscontrol.dll | ️microsoft.win32.registry.accesscontrol.dll
Mozilla Corporation