What Is a DLL File?

A DLL (Dynamic Link Library) file is a small system file that Windows programs use to work properly.
When a DLL file is missing, corrupted, or incompatible, Windows shows errors like:

• “The program can’t start because xxx.dll is missing.”

• “xxx.dll was not found.”

• “Code execution cannot proceed.”

Common DLL names people see:

• vcruntime140.dll

• msvcp140.dll

• d3dcompiler_47.dll

• api-ms-win-crt-runtime-l1-1-0.dll

Why DLL Errors Happen

DLL errors usually happen because:

• A program was installed incorrectly

• Windows update broke dependencies

• System files are corrupted

• Malware changed system files

• Required runtime packages are missing

⚠️ Important: The problem is usually not “just the DLL file.” It’s something deeper.

✅ Step-by-Step: How to Fix DLL Missing Errors

Follow these steps in order.

Step 1: Restart Your PC

Simple but effective.
Restart clears temporary memory issues and reloads system files.

Try opening the program again after restart.

Step 2: Reinstall the Program Showing the Error

If the error appears when opening one app:

1. Go to Settings → Apps → Installed Apps

2. Uninstall the affected app

3. Restart your PC

4. Download it again from the official website

5. Reinstall and test

This fixes many DLL errors automatically.

Step 3: Install Microsoft Visual C++ Redistributable

If you see errors like:

• vcruntime140.dll missing

• msvcp140.dll missing

Then the Visual C++ runtime is likely missing.

Install the latest:

• Visual C++ Redistributable (both x64 and x86 versions)

Restart your PC after installation.

This solves a very high percentage of DLL problems.

Step 4: Run System File Checker (SFC)

This checks Windows system files.

1. Type cmd in Start

2. Right-click → Run as Administrator

3. Enter:

4. Wait until it finishes

5. Restart

SFC restores corrupted Windows files.

Step 5: Run DISM (If SFC Didn’t Fix It)

Open Command Prompt as Administrator and run:

Restart after completion.

DISM repairs deeper Windows image issues.

Step 6: Update Windows

Go to:

Settings → Windows Update → Check for updates

Install all updates and restart.

Sometimes DLL files are restored via Windows updates.

Step 7: Run a Full Malware Scan

1. Open Windows Security

2. Go to Virus & Threat Protection

3. Run Full Scan

Malware can delete or replace DLL files.

Step 8: Check Recycle Bin

If you recently cleaned files:

• Open Recycle Bin

• Search the DLL name

• Restore if found

Step 9: Use System Restore (If Error Started Recently)

If the issue started after an update:

1. Search “Create a restore point”

2. Open System Restore

3. Choose a restore point

4. Restore and restart

⚠️ Step 10: Manually Download and Replace the DLL (Last Option)

⚠️ Warning: This method can be risky.
Downloading DLL files from unknown websites may introduce malware or system instability.

Only try this if all other fixes failed.

When Should You Try Manual DLL Replacement?

Only if:

• The error shows one specific DLL name

• Reinstalling the program didn’t fix it

• Visual C++ install didn’t fix it

• SFC & DISM found no issues

How to Manually Replace a DLL File

1️⃣ Check Your System Type

Go to:
Settings → System → About

Check if your PC is:

• 64-bit (x64)

• 32-bit (x86)

Download the correct version only.

2️⃣ Download from a Trusted Source

⚠️ Avoid random DLL websites.

Better options:

• Official software vendor website

• Microsoft official runtime packages

If you still download a DLL file:

• Right-click file

• Scan with Windows Security before using

3️⃣ Place DLL in Correct Folder

For 64-bit Windows:

• 64-bit DLL → C:\Windows\System32

• 32-bit DLL → C:\Windows\SysWOW64

For 32-bit Windows:

• Place DLL → C:\Windows\System32

You may need administrator permission.

4️⃣ Register the DLL (If Needed)

Open Command Prompt as Administrator and type:

Example:

Press Enter and restart your PC.

⚠️ Risks of Manual DLL Replacement

• Wrong version may cause more errors

• Malware infection risk

• Windows updates may overwrite file

• System instability

This method should be your last option.

Most Common DLL Errors & Best Fix

Safe Order Checklist (Recommended)

Follow this exact order:

1. Restart PC

2. Reinstall app

3. Install Visual C++

4. Run SFC

5. Run DISM

6. Windows Update

7. Malware scan

8. System Restore

9. Manual DLL replacement (last)

Final Thoughts

Most DLL errors are caused by missing runtime packages or corrupted system files — not by a single lost file.

In most cases, reinstalling the app or installing Visual C++ Redistributable solves the issue.

Manual DLL download should only be used carefully and as a last resort.

Fix the root cause, not just the file.