I have 3 pc's (one vista and 2 xp home) that have been successfully running Trend Micro Internet Security 2007 for some time. I've tried many security suites over time and find this one of the best for home use. I upgraded all to the 2008 version in the last week and had significant problems with every install. The problems were severe - the vista pc would only boot properly on occasion and the xp machines either hung during a virus scan or took forever to start up. I had to revert to 2007 on all pc's within a couple of days. So my advice is to wait a while till they update the September 26 version. I can't understand why they have released such an immature product. The damage to product image can't be worth the benefit of being one of the first companies to release a 2008 security suite onto the market.