I had my mother purchase Trend Micro AntiVirus + to protect her computer. I loaded and set it up. The problem that keeps arising, she downloads a free program and it asks if she wants to download a free trial Antivirus program. She either checks "Yes" or leaves "Yes" checked, not sure which. Then it uninstalls Trend Micro and installs the trial program. I thought I put a password in to prevent unauthorized changes to Trend Micro, but it has happened a couple of times already.