My Compaq computer with Windows Vista Home Premium crashed last week because a virus killed off my hard drive and I have had to purchase a new computer. It is the same model and includes a free "trial" McAfee antivirus program. But I've heard that two antivirus programs should not be installed at the same time. Can anyone tell me if I can safely remove this "trial" McAfee antivirus program and download/install another antivirus program, such as AVG Anti-Virus Free, which would be far more affordable? I do not want to harm my new computer. Please help! All advice will be much appreciated. Thanks.