If you have lost the McAfee activation key, you can retrieve it if you purchased it via online mode. One thing you need to keep in mind is that you must register to the official website of McAfee. Have a look at the steps which you can use to get your activation key back: Log into the McAfee official webpage mcafee.com/activate You need to go to the ‘My Order’ section That’s it; here you will get to know the product key of McAfee You can follow the simple steps provided above to find your McAfee activation key back. If you still can’t recover, you can connect with the experts at McAfee customer service and avail assistance from them.