1 of 1 customers found the following review helpful: A waste, 2008-08-02 I used it on a MAC. It might identify a virus but it won't fix it so you have to delete the file. Gee, brilliant. And not at all helpful. Don't waste your money. 4 of 4 customers found the following review helpful: Faster & less resource hungry, 2008-03-05 Outside of the original system scan, I have found Virus Barrier X4 & X5 to be faster and less of a drag on system performance than Norton Anti-Virus and Virex. The manufacturer has also provided timely and fair support. They supplied a free upgrade from Version X4 to X5 within 45 days of purchase without hassle or resistance when prompted with a polite email.