How to Fix the Windows Defender 0x800704E8 Error?

Solve Windows Defender update error code 0x800704E8

Windows Defender error code 0x800704E8 usually appears when trying to update Windows Defender. This article will guide you through this problem. Keeping Windows Defender updated is crucial because it extends the database of observable viruses and malware and enhances protection. However, an update failure may result in a 0x800704E8 error.

Suggestions: Back up data regularly

To deal with potential protection vulnerabilities, it is recommended to back up your data regularly. MiniTool ShadowMaker is a free backup software that helps you back up your system, files, folders, partitions and disks, and supports daily, weekly, monthly and other backup plans.

Solution:

Method 1: Run the Windows Update Troubleshooter

The Windows Update Troubleshooter can help resolve Windows update issues, including Windows Defender update issues.

Step 1: Go to Start > Settings > Update & Security > Troubleshooting .

Step 2: Click on other troubleshooters in the right panel, and then click Windows Update .

Step 3: Click to run the troubleshooter program to start checking and repairing.

Method 2: Perform SFC and DISM scanning

SFC and DISM scans can check and repair system file corruption.

Step 1: Enter a command prompt in the search and select Run as administrator .

Step 2: Enter sfc /scannow and press Enter to start running.

Wait for the process to complete, and then execute another command for further checking.

Step 3: Once finished, enter and run this command: DISM /online /cleanup-image /restorehealth .

Close the window and restart the computer to check if the error has been fixed.

Method 3: Delete Windows Defender signature file

A corrupted signature file may prevent Microsoft Defender from updating, and you can download new files by deleting old ones.

Step 1: Close Windows Defender and press Win R to open the Run dialog box.

Step 2: Copy and paste this command: Msiexec /x {A5CC2A09-E9D3-49EC-923D-03874BBD4C2C} and press Enter .

Start Windows Defender and try to update again. When finished, restart the computer.

Method 4: Manually update Microsoft Defender through CMD

Step 1: Run the command prompt as administrator and copy and paste this command to clear the cache: "％ProgramFiles％\Windows Defender\MpCmdRun.exe" -removedefinitions -dynamicsignatures .

Step 2: After completion, run this command to update the definition: "％ProgramFiles％\Windows Defender\MpCmdRun.exe" –SignatureUpdate .

Restart the computer and start Windows Defender to see if the error has been fixed.

Summarize:

This article provides several ways to solve Windows Defender update error code 0x800704E8. You can try these solutions to solve the problem.

The above is the detailed content of How to Fix the Windows Defender 0x800704E8 Error?. For more information, please follow other related articles on the PHP Chinese website!