acppage.dll - Analyze and How to Fix Errors

★★★★☆ Verified File (27.08.2026)

⚠️ Important Notice: dll now for optimal application performance. Essential for system stability. Manually replacing system libraries can brick future Windows updates or cause critical system failures.

Architecture:	other	️ Not detected
Antivirus scan	✅ Clean	No viruses detected.
Digital signature	🟡 Not signed	Signature missing. The file may have been modified.
Hash Integrity	ℹ️ Unverified	File Hash protection is missing.
File size	16.3 kb.	16735 bytes.

Hashes:

MD5: a1dd87edc606d51fb34f8362f5d27154
SHA-1: 491e699b3cbc2333d86cdcc18fbd5f1f92521b0e
SHA-256: 5ea0d52872146d3540cf132a1621529bf3a5b1afb6b2b7d80f62d0d48cbed1fb
SHA-512: 11f6ac135bbb69405c33b0a8b8f61b34819c8b09a03d829d8f7a2f685b82fc5f6c0739337b684236c75468a560a685fdec035e747469d1f8d9daf160db7931da

acppage.dll is the "ACT Compatibility Wizard Page" DLL, a legitimate Microsoft system component used by the Windows Application Compatibility Toolkit. It helps Windows configure and apply compatibility settings for older software applications.

Standard File Location

The standard location for this file is in the Windows system directories:

C:\Windows\System32\acppage.dll (for 64-bit systems)
C:\Windows\SysWOW64\acppage.dll (for 32-bit application compatibility on 64-bit systems)

How to Fix acppage.dll Errors Without Downloading

Do not download this file from third-party websites, as they often contain malware. Instead, use built-in Windows utilities to repair it safely.

Method 1: Run the SFC and DISM Tools

Windows has built-in tools that automatically scan and replace missing or corrupted system files using the local recovery image.

Press Windows Key + X and select Terminal (Admin) or Command Prompt (Admin).
Type the following command to repair the system image and press Enter:
```
DISM.exe /Online /Cleanup-image /Restorehealth
```
Wait for the process to finish (it may take a few minutes).
Next, type this command to scan and replace the specific DLL file, then press Enter:
```
sfc /scannow
```
Restart your computer after the scan completes.

Method 2: Re-register the DLL File

If the file exists but Windows cannot read it correctly, re-registering it via the Command Prompt can resolve the error.

Open Command Prompt as Administrator.
Type the following command and press Enter:
```
regsvr32 /u acppage.dll
```
Then, type this command to re-register it and press Enter:
```
regsvr32 acppage.dll
```
Restart your system.

Method 3: Use System Restore

If the error started happening recently, you can roll back your system to a state when the file was working perfectly.

Press the Windows Key, type Create a restore point, and press Enter.
Click the System Restore... button.
Choose a restore point dated before the error first appeared.
Follow the on-screen prompts and let Windows restart to complete the restoration.

If you would like to proceed with troubleshooting, let me know:

What is the exact error message you see?
When does the error happen? (e.g., during Windows startup, or when opening a specific app?)

📊 Diagnostics Tool: Verify Your `acppage.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:
️ acppage.dll 10.0.19041.5794 32-bit (x86) | ️ acppage.dll 10.0.19041.5794 64-bit (x64)
Similar files:
️acppage.dll.mui