Fields only update when I click out of them!

I am running Blender 2.48. on a Windows lap top (new in '08). When I click on a field to change a number or the name of something, it does not show that it is being modified until I click out of it. The same applies when saving a file, the name I type does not show up until I click out of the field. What is wrong?

What other info do you need to help?

Thanks in advance,