Unlikely, as flavours I've tried like Linux Ubuntu require you to enter your own personalised password first before you're allowed to make any system changes. This works the same in Macs and since Mac OSs and Linux OSs are derivatives of the UNIX OS, neither of them have any virus issues. If you'd like to try Ubuntu before you commit and load it, you can dl and burn its ISO to CD, put it in your ROM drive and run a 'live' version which basically means the OS will boot from CD and only run in your computers memory (RAM). It will be a little slower than if you just installed it, but it gives you an opportunity to test drive it before you make the leap. OBTW, there's a Windows App which allows you to install it in Windows real easily. It's called Wubi and if you install Ubuntu via this, your system will offer you dual boot functionality even thought you've just installed Ubuntu just like any other windows app. Hope this helps.:Clap::Clap: