Trend Micro, Panda, CA and Symantec all have announced that they'll ship updated suites on Tuesday -- just in time for the consumer availability of Vista.

Microsoft claims McAfee will support Vista, but hasn't said when. The company itself has not announced Vista support. And some, but not all, ZoneAlarm products will support Vista by next week. The smaller the company, the longer it will generally take for them to support Vista.

Gaming on Vista -- and Vista's DirectX 10 graphics support -- is awesome for gamers. But that's something you'll be able to fully take advantage of only later. The full gaming potential of DirectX 10 requires three elements -- an operating system, supporting graphics hardware and supporting games. The operating system is ready, the graphics hardware is partly ready, and the games are nowhere. Eventually, Vista will be the ultimate PC gaming platform. But there's simply no reason for gamers to rush out and buy Vista next week.

2. Vista is expensive

Microsoft offers three versions of Vista to home users in the U.S. -- Home Basic, Home Premium and Ultimate. You can buy any of these in the upgrade version with a discount, or the stand-alone version without the discount.