ooofilt.dll - Analyze and How to Fix Errors

★★★★☆ Verified File (27.08.2026)

⚠️ Important Notice: Fix OOoFilter Errors with ooofilt.dll 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	08.10.2025 22:43:48
File version	4.1.9816.500
Antivirus scan	✅ Clean	No viruses detected.
Digital signature	🟡 Not signed	Signature missing. The file may have been modified.
Hash Integrity	✅ MD5: Verified	File Hash protection is missing.
File size	246 kb.	251904 bytes.

Hashes:

MD5: 2d187b54af35b06e4805b8ab20669825 ✅
SHA-1: c6465bbb86a455b713672d85caeea12555353deb
SHA-256: b8ad920d1a2cb133ea3774c8098958cbbb257407757eaf0c13ff2f8e035df009
SHA-512: b725473ce0cf770c592206f2a22df550b9997914c80798ac46af59631e288549e8fdf84cc8ea738ff97ed72b38581215c59aba41b1d42da8a0c0b5d78312a53f

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

To fix a missing or corrupted offfilt.dll (often misspelled as ooofilt.dll, which is the Microsoft Office Filter system file) without downloading any sketchy third-party files, you should use the built-in Windows diagnostic tools.

Here are the step-by-step methods to resolve the error safely:

Method 1: Run System File Checker (SFC)

The SFC tool is an official Windows utility that scans and automatically replaces missing or corrupted system files like offfilt.dll.

Press the Windows Key, type cmd, and right-click Command Prompt.
Select Run as administrator.
Type the following command and hit Enter:
```
sfc /scannow
```
Wait for the process to reach 100%. If it finds errors, it will restore the DLL from a local cache folder.
Restart your computer.

Method 2: Use the DISM Repair Tool

If SFC cannot fix the file, the Deployment Image Servicing and Management (DISM) tool will fix the local system image using hidden Windows components.

Open Command Prompt as an administrator again.

Type the following command and press Enter:

DISM /Online /Cleanup-Image /RestoreHealth

Let the tool complete its process (this may take 10-15 minutes).
Run the SFC tool one more time (sfc /scannow) to ensure everything is fixed.

Method 3: Reinstall Microsoft Office or the Affected Software

If the error occurs only when opening a specific app (like Excel, Word, or an indexing program), the built-in application repair tool will restore the application's unique DLL links.

Press Win + R, type appwiz.cpl, and press Enter to open Programs and Features.
Locate Microsoft Office (or the affected program) in the list.
Right-click it and choose Change or Modify.
Select Quick Repair or Online Repair to restore missing software-specific files locally.

If the problem persists, please let me know which program throws this error, or share the exact error code so we can look at application-specific steps!

📊 Diagnostics Tool: Verify Your `ooofilt.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:
ole32.dll
├── ADVAPI32.dll
├── KERNEL32.dll
├── MSVCP90.dll
├── MSVCR90.dll
└── USER32.dll

Similar files:
️ooofilt_x64.dll