I know lots of users say that I don't need an anti-virus for the Mac but it came with the Symantec Anti-virus 9.0 now I get this error message everytime I start up my Powerbook. The error message says Norton Anti-virus Autoprotect could not continue Please reinstall Norton Anti-virus and restart. I did that and I also did an update but the same problem happens. Any ideas how to solve this probelm? 