Strange Behavoiur

Hi Guys

sometime when I work on windows 98 and when I type M or any e or any character pertaining to shortcuts keys either explorer or something comes up.

is there any way that I can disable these shortcut keys frm win98 so that when I want enable them. when I press E character explorer comes up – I do not want that. I need to stop this and this also happens with my friend’s pc.
kindly help plz

thanks
prajeeth