pro Engineer crash in sketch mode

This happened many times. It only happens when I am in sketch mode.
Few times I tried to drag a rectangle to select a group of feature and
then the whole Pro/e window just disappeared. Another crash is when I
scroll the wheel to zoom out in sketch mode.

I am using pro/E 3.0 but same problem happens to the 2.0 version. Also
back in school I was using educational version, same thing happened.

I talked to the custom service but they do not have effective
solution. Can anybody enlighten me on this? Thanks.

 

Using XP: We found that reverting to the windows classic interface &
turning off all the whizz bang screen effects (in My Computer -
Advanced - Settings - set for best performance) improved system
stability considerably.

 

Plus your computer screen doesn't look stupid any more.