I have used Norton products for many years without a problem, including Norton Internet Security 2005. Recently I purchased NIS 2006. What a mistake. Every time I run a virus scan, the computer crashes. Total lights out, power down, blank screen! Three sessions with the very polite but not-much-help Symantec online tech support staff in India could not find a solution. (I should have to PAY THEM for phone support when their product won't run correctly??) Uninstalling and reinstalling was no help, either. This is the last Norton product for me.