The McAfee error may give rise to some security concerns and a message appears on the screen whenever you open this application – McAfee cannot update your software. Prior to proceeding with any troubleshooting steps, check for the internet connection you have. It is possible that you are seeing all the available updates but are unable register your product. It is also important to have a McAfee retail card activation code for registration. You have typed the Activation key incorrectly. Try typing it once again. If you still see the Invalid Activation Code error, you need to connect with an expert for assistance(McAfee Support Number).
Most often, the software does not update due to poor or no internet connection. If this is not your case, then, it’s better to ask an expert to know the actual cause of the error. You can give it a try once by following these given steps to fix it.