dnsapi.dll - Analyze and How to Fix Errors

★★★★☆ Verified File (27.08.2026)

⚠️ Important Notice: DNS API DLL file essential for domain name resolution in Windows applications. 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	41.2 kb.	42229 bytes.

Hashes:

MD5: ed9a473a6836ec653bfc617a3de4f6da
SHA-1: c9cc03a5159f0b441e5e89266870f618dd6db298
SHA-256: 25aeedda65a5ed952b9e7763770bfb5cc5980be9bfd4cb34c141de6c3bc866eb
SHA-512: 61009b5769a1833c9e5247204ae9c2be65f45b812c67b2d952465296297f33386d98b22a206354ac95d06a707e5239a965aceaf39fa65a6bff1997ddd4a03c6d

The dnsapi.dll file is a critical system component responsible for handling DNS lookup requests in Windows. If it is corrupted or missing, you will face internet connection issues or application crashes.

You can fix this error completely using built-in Windows tools without downloading anything from third-party websites.

1. Run SFC and DISM Scans

Windows has built-in repair tools that can automatically replace corrupted system files like dnsapi.dll with clean, original copies.

Press the Windows Key, type cmd, and right-click Command Prompt.
Select Run as administrator.

Type the following command and press Enter:

DISM.exe /Online /Cleanup-image /Restorehealth

Wait for it to finish, then type this command and press Enter:
```
sfc /scannow
```
Restart your computer after the scan completes.

2. Flush and Reset Network Settings

Corrupted network caches can cause the system to misread the dnsapi.dll file. Resetting the network stack can resolve this.

Open Command Prompt as an administrator.
Run the following commands one by one, pressing Enter after each:
```
ipconfig /flushdns
```
```
ipconfig /registerdns
```
```
netsh winsock reset
```
Restart your PC.

3. Restore via System Restore

If the error started happening recently, you can roll Windows back to a time when the file worked perfectly.

Press Windows Key + R, type rstrui, and press Enter.
Click Next in the System Restore window.
Choose a restore point dated before the error started appearing.
Click Next and then Finish to start the process.

4. Copy the File from Windows Component Store

Windows keeps a backup copy of original DLL files in a hidden system directory called WinSxS. You can manually copy the clean file back to its correct location.

Open Command Prompt as an administrator.
Find a healthy copy of the file by running:
```
dir /s c:\windows\winsxs\dnsapi.dll
```
Look for a directory in the results that matches your Windows version.
Copy the file back to the system folder by typing (replace [PATH TO WINSXS FOLDER] with the actual folder path found in step 2):
```
copy "C:\Windows\WinSxS\[PATH TO WINSXS FOLDER]\dnsapi.dll" C:\Windows\System32\
```
Type Y to confirm overwriting the broken file.

📊 Diagnostics Tool: Verify Your `dnsapi.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:
️ dnsapi.dll 10.0.19041.5369 32-bit (x86) | ️ dnsapi.dll 10.0.19041.5369 64-bit (x64)
Similar files:
️dnsapi.dll.mui