Do you speak computerese?

I thought that computers were all about 1's and 0's.

I want to know where the shades of grety come into it. Why is is that if I try the same thing, repeating all the same steps, I get different results?

Somewhere in this little metal box underneath my desk a tiny imp sits and laughs at me.
(I've tried a good stiff kick to the hard drive, but trust me...that doesn't fix things).

Anyone know a good exorcist?