Encountering an application startup error, such as "EXCEPTION ILLEGAL INSTRUCTION"? Don't worry, this article offers a variety of solutions.

EXCEPTION_ILLEGAL_INSTRUCTION Error Detailed Explanation

EXCEPTION_ILLEGAL_INSTRUCTION or EXCEPTION_ILLEGAL_VIOLATION Indicates that the processor cannot execute instructions, usually means that the system lacks the critical components needed to run a specific program or perform certain operations. The complete error message is similar:

Application Error:

Extremely illegal instruction

Attempt to execute an illegal instruction.

(0xc000001d) occurs at this location in the application.

Click OK to terminate the program.

This error can be caused by compatibility issues, outdated graphics card drivers, missing or damaged Microsoft Visual C redistributable components, etc.

Fix EXCEPTION_ILLEGAL_INSTRUCTION error method on Windows 10/11 system

Method 1: Run the System File Checker (SFC)

Corrupted system files may cause this error. System File Checker (SFC) detects and repairs these files. The steps are as follows:

1. Enter "cmd" in the search bar, right-click "Command Prompt", and select "Run as Administrator".
2. Enter sfc /scannow and press Enter.

Method 2: Run the program in compatible mode

For older applications, try running with compatibility mode. The steps are as follows:

1. Right-click on the program and select "Properties".
2. In the Compatibility tab, check Run this program in compatibility mode and select the operating system.

3. Click Apply and OK to save the changes.

Method 3: Clean start

Some third-party software may conflict with the target program. A clean startup can avoid such interference:

1. Press Win R to open the Run dialog box.
2. Enter msconfig and press Enter to open System Configuration.
3. In the Services tab, check Hide all Microsoft services, and then click Disable all.

4. Go to the Startup tab and click Open Task Manager.
5. Right-click on each enabled item and select Disable.
6. Return to the Services tab of System Configuration and click Apply and OK.
7. Restart the computer and run the program again.

Method 4: Reinstall Visual C Redistributable Components

Missing or corrupting Microsoft Visual C redistributable packages can also cause this error. Reinstall the component:

1. Right-click the Start menu and select Run.
2. Enter appwiz.cpl and click "OK" to open "Programs and Features".
3. Find "Microsoft Visual C Redistributable Package" and right-click to select "Change".

4. Click "Repair" and follow the on-screen instructions to complete the operation.

Method 5: Verify the integrity of the game file (taking Steam as an example)

If this error occurs when starting the game, the game file may be corrupted. Verify the integrity of the game file (taking Steam as an example):

1. Start Steam.
2. Find the game in "Library" and right-click to select "Properties".
3. In the Local Files tab, click Verify the integrity of the game file.

Summarize

This article introduces the EXCEPTION_ILLEGAL_INSTRUCTION error and its solution. Hope these steps will help you run all your programs smoothly!

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