McAfee antivirus is one of the best internet security software programs which employs various protection tools for keeping your network secure. If you want the excellent device and network protection for your computer at good prices then you download and install McAfee antivirus on your system. Make sure you are activating your McAfee antivirus with the correct product key. 

Steps to activate my McAfee Product Key

  1. Open your McAfee dashboard
  2. Click on My Info
  3. Click on My subscription
  4. Hit the Activate button
  5. You will be redirected to McAfee activation page
  6. Type your product key (you can also copy and paste the key from your email address)
  7. Click on OK button

After activating your McAfee antivirus; you can easily keep your device fully protected. But many people face a few errors while installing McAfee antivirus. Installing errors usually occur when your device is not compatible with your antivirus. But there can be other reasons also which can cause McAfee uninstall error 1921. Any defect on your registry entry can show various types of error. It is also possible that some malware has infected your computer. Some people got this error when they deleted McAfee program files mistakenly.

Top ways to resolve McAfee error 1921:

Check your device specification

Like all other programs, McAfee antivirus also has specifications for installing or running properly. If your device is unable to fulfill all the requirements of your McAfee antivirus then it will not install on your device. So, you should always check the device specifications before purchasing McAfee antivirus and then get the plan which is compatible with your PC.

Repair your registry entries

Registry entries are necessary for working properly. If your registry entries get corrupted then you should repair them immediately. Repairing the registry files is not easy as a single mistake can get you into other issues. If you are not from a technical background then you should ask for professional help. You must get the backup key before editing the registry files. Follow the steps for creating the backup key:

  1. Open Windows PC and then go to Start button
  2. Type command in the search bar and press the enter button
  3. A permission box will appear on the screen
  4. Hit the Yes button

Now a black box (command prompt) will appear on the screen

Type regedit on the command prompt and press the enter button

Windows registry editor will appear on the screen. Save the McAfee key and export the file with .reg extension. Once you create the backup key for McAfee antivirus then you can proceed to edit the registry files.  

Remove the junk files

Temporary files and caches may create conflict with program files. These files not only occupy the space but can also harm the RAM and device. Deleting all the junk files from the device may troubleshoot your error. Delete the temporary files, caches, and other unnecessary data from the system. You can also remove the files by using the Disk cleanup tool. Here are the steps for removing the junk:

  1. Open your device and type command on the search bar
  2. Hit the Enter button
  3. A permission box will appear on your screen
  4. Press Yes button
  5. Black command prompt will be displayed on the screen
  6. Type cleanmgr and press the Enter button

Now the cleanup tool will appear on the screen and check all the files of your computer. Check for all the boxes you want to delete from the system. Then restart your computer and try to install McAfee antivirus on your computer.

Any fault on PC drivers can stop various programs. If your PC drivers are not updated then you should update them instantly. But ensure that you are updating the correct drivers because finding the correct update is not easy. You can also use the driver updating tool which finds the correct driver for your device and update automatically. If you are still facing the same error then you should ask for technical help.