Bruce gave some excellent advice. I myself do the same thing for security reasons. When I am fixing or updating things, I either use another account or switch to superuser mode. Whichever applies.
Now, if only I could get linux onto this laptop. SIGH
It is really frustrating to burn the .iso onto a CDROM and then put it into the drive and it refuses to recognise it. No data CD works, for that matter. But music and DVDs still work. So I don't get it. I'm going for a thumb drive from now on.