keyboard in Windows XP

Hi,

I recently installed Windows XP fresh, and found out the system is
working very easy. I have, however, one problem.

When I want to adapt multiple text-files in a text-editor, when
I open the second text-file, the keyboard-layout changes. Suddenly
I can't find the < and > keys anymore, only the . and , seem to be
at their own position.

I already bought myself a new keyboard, thinking the problem would be
solved if I used a keyboard that was manufactured when XP was becoming
the standard. The problem wasn't solved. Today, I decided to throw away
the drivers of the keyboard and restart, the files were installed
automatically. Still, the problem persists.

Anyone on this?