So, to help avoid catching anything nasty, don't run Windows as Administrator heh.

What about all the software that won't install or run unless you are:

1. The user who installed it.

2. Logged in as an Administrative account.

If only Windows came with the same option as KDE - if the software instalation requires it - bring up a box asking for the root / admin password?

Problem is, most Windoews software installs itself with files or registry settings that are tied to the user who is logged on to do the installation.

Sure, there's the utility to remove user rights from programs you run but surely the 'nix GUI has it the right way round.