Any security program that can turn itself off merely by updating the browser, something it tells you to do, is not a program you want "protecting" you. Windows OneCare uses Microsofts "activation" technology which is unreliable. One morning I updated IE7 as instructed by OneCare and the program told me it was not activated. I tried to re-activate, and though I could clearly see on the Microsoft site that I had purchased Onecare, it would not activate. Tech support is slow and the answers you get may leave you wondering if they actually read your message.OneCare also sometimes indicates that it has found viruses that are not there. I received a false positive that would have caused me to delete a file that Windows requires if I had not used several other AV programs to confirm that the file was not virus infected.Simply stated, OneCare is unreliable, too unreliable to protect your computer. I strongly recommend against buying this product.