windows defender windows 7 will not start

In the Command Prompt, type this command and press the Enter key:.

Press the Windows + X key and select Command Prompt (Admin) from the list.

To run the SFC, follow these instructions one-by-one: So, to check and repair the corrupted system files, you may use the System File Checker tool. Get Revo Uninstaller to Uninstall the Software Completely Solution 3: Check Your Windows System FilesĬorrupted Windows system files can cause the “Windows Defender won’t turn on” issue. Hence, it is suggested to use Revo Uninstaller to remove the program completely from the computer without leaving any traces. And, these leftover files conflicts with other functions and also while reinstalling the program. Often found that uninstalling the program manually doesn’t remove it completely from the computer as it leaves traces on the system.

Click on the Uninstall button and, then follow the onscreen instruction to remove it from your computer.

Now in the App & Features window, click on the installed third-party antivirus.

In the Windows Settings, select the Apps.

To uninstall it, you need to do the following: If it doesn’t work, then uninstall the antivirus and later try to start the Windows Defender. Hereafter, if there is any other antivirus installed on your system, then disable the antivirus to fix the Windows Defender won’t start issue. If there is a third-party antivirus installed on your computer, Windows Defender will detect it automatically and turn itself off. Solution 2: Disable/Uninstall Third-Party Antivirus If still, Windows Defender won’t work, then go to the next solution.

Choose the server “ ” and click on the Update and “ OK” button.Īfter doing this and updating the data/time of your system try to start the Windows Defender.

Click on the “ Set Time Automatically”, to “ on” or click on the “ Internet Time” and check the “ Synchronize with an Internet time server”.

First, click on the date and time and then choose “ Date and time settings.”.

And, to check it, follow the given steps: So, before moving to any other solution make sure the Date & Time on your system is correct. Consequently, Windows Defender may stop working properly. And, the wrong time and date could trigger unusual behavior on the computer. Most of the functions on the Windows 10 computer depend on the Time & Date of the system. Solution 1 : Check for the Date & Time of your PC/Laptop

Solution 10: Clean Boot Your Windows 10 Computer.

Solution 8: Restart Security Center Service.

Solution 5: Turn on Windows Defender from Registry Editor.

Solution 4: Start Windows Defender Services.

Solution 3: Check Your Windows System Files.

Solution 2: Disable/Uninstall Third-Party Antivirus.

Solution 1: Check for the Date & Time of your PC/Laptop.

Windows defender windows 7 will not start