McAfee provides computer security solutions to both individuals and businesses. McAfee provides one of the simplest yet effective means for people across the globe to safeguard their data and protect their identity as they navigate their cyber lives across several connected devices. In the span of thirty years, McAfee has established a brand name of its own. It secures electronic devices against malware, viruses, and other cybersecurity threats. Moreover, it is extremely user-friendly and can be readily purchased. If you have purchased a McAfee product key, then for activation visit mcafee.com/activate.
Method 1
Edit the Windows Registry and remove invalid error 3299 keys
Open Start.
Write “command” in the search box and press CTRL+SHITF+ENTER
Press Yes in the Permission Dialog box.
Write “regedit” in the black box and press enter.
Find the Key related to /Error 3299 in the Registry Editor.
Go to the File menu.
Click on Export.
Click on Save In. choose the folder where you wish to save the backup key.
Enter a file name in the box.
Click on save.
Method 2
Uninstall and Reinstall McAfee Antivirus
Windows 7 And Windows Vista
Go to Start.
Click on Control Panel.
Select Programs.
Go to Programs and Features.
In the name column, find the program associated with McAfee Error 3299.
Click on McAfee Antivirus associated entry.
Click on Uninstall.
Follow the on-screen steps and complete the uninstallation of the program related to Error 3299.
Windows XP
Go to start.
Click on Control Panel.
Select Add or Remove Programs.
Go to the list of currently Installed Programs.
Find the McAfee error 3299 related programs such as McAfee antivirus software.
Click on Remove button next to the program.
Follow the instructions on the screen.
Click on Close when uninstallation is complete.
Windows 8
Open the start menu.
Click on Programs and Features to open it.
Find the McAfee program below the Name column.
Click on the entry associated with McAfee.
Click on Uninstall.
Follow the on-screen instructions and complete the process.
Click on close when done.
Restart the computer for the changes to take effect.
Steps To Reinstall McAfee Antivirus
Install McAfee antivirus program from scratch. If you had purchased it from a store, then use the CD or download the software again. If your ISP or computer manufacturer gave you the McAfee antivirus software, ask them for the installation file.
Log in to your McAfee account. Go to “My Account” and click on “Sign in.” Enter your email and password and click on Log In.
Go to My Account and click on subscriptions.
Next to your McAfee antivirus subscription, click on Add Device.
Select the device type such as PC, mobile, etc.
Click on download.
Accept the license agreement.
Download the setup of McAfee Antivirus software.
Run the setup file when it has downloaded.
Follow the on-screen instructions and install the McAfee software.
To download, install, or activate McAfee antivirus product key, go to this website www.mcafee.com/activate.
