I signed up for McAfee protection via Yahoo - free for 30 days and then $4.99 per month. When I tried to download the product I was told it wouldnot work on my Chromebook! I contacted McAfee to withdraw this signup and to STOP any monthly payments. They said I had to go through Yahoo since I signed up through them. I have spent a LONG time trying to find how to contact Yahoo to get this whole process STOPPED!! I will NOT be allowing payments to go on my credit card without notifying authorities of this problem!!!