Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Scans fast,but..............

I installed this product and it seemed to work OK at first. The boot-up and systhem seemed to run a little slower, but I know that anti-virus and firewalls do take resources. The problem came when I updated the program. I couldn't get windows to load when McAfee did it's DOS scan. This was on a 700 athalon slot A with 384mb memory. I had to go in safe-mode and uninstall it to get windows to load. It seemed like a good product otherwise, but if it won't let your operating systhem load it doesn't do you much good. I'm still puzzled.