McAfee antivirus is the world’s famous security suite which gives protection to your device from online threat like malware and viruses. It is very simple to use and runs in the background without interrupting your work. It gives updates so that your device can fight against the emerging threat. It scans the data and creates a wall between the threat and your device. It gives user friendly interface but some user encounters trouble and gets the error message 66. In this blog, you will read the solution to resolve McAfee Error Code 66.

This error occurs because of the mis-configuration of the system setting or also due to the corrupt window registries.

Solutions to Resolve McAfee Error Code 66:

1: Clean Out System Junk or Temporary Files:

For windows:

First, you have to open your computer system. Then, you should go to the start button. Here, the search box displays on your computer screen. Now, you should type the command in the box. After this, you have to press the ctrl+shift button at the same time and just hit Enter key. Then, you will see the permission dialog box displays on your system screen. You just have to select the Yes option. Now, the blinking cursor with a black box will display on your computer screen. You should type in cleanmgr there and then press Enter key. At this point, the disk cleanup will calculate the free space. Then, you should select the checkbox which displays on your screen. And here, you should select the temporary files category and also select the boxes which you wish to clean. At last, you should click on the Ok button.

Read Also – Incredible Method to Fix McAfee Error Code 43

2: Uninstall McAfee Program Linked with the Error 66:

For windows:

First, you have to open the computer and then just go to the start button. After this, you have to click on the control panel option. Then, just click on the programs option and then choose programs and features. At this point, the error related to McAfee after effects. Now on the top menu, you will see the uninstall option. Here, you have to press the Uninstall option. At the end, you should follow the directions to finish the uninstallation procedure.

3: Run the Preinstall Tool:

First, you should download the preinstall tool. Then, you have to ensure that you have saved your files to your computer. Now, you should click on the pre-install tool. Here, the warning message dialog box displays on your computer screen. After this, you should click on the Ok option to save the changes. Now, the preinstall tool has completed its work and then click on ok button. Then, you should click on the Close option. At last, you should restart your computer system.

The above method will help you to solve McAfee Error Code 66. But if the user is still facing the problem then they can contact to the customer care of McAfee team anytime. The experts are well trained to give the solution of your problem and are available 24/7. And for more information, they can visit to the official site of McAfee Antivirus.