Hi there I've had the very same problem with my vista PC and after 4hrs and 8 blue screens, decided to email pico and tell them to shove it! I want a refund. Yes I too was confused by the bundled desktop AV application and had more blue screens with with both installed... but I also had blue screens with just pico installed in the first instance. Finnally - I noticed a large processor grab and disk usage with the device installed which baffled me as this defeated the object. My new dual care ROCK laptop suddenly became as slow as my single core 2 ghz 4 year old PC.. mmm dont bother folks.