At our school I have installed McAfee Antivirus Version 4.5, on over 40 computers. All are running Win 98 SE and Pentium II or III 400 to 750 CPU. Three of these will not shut down properly unless McAfee is disabled. Four of these cause IE 5.5 to freeze, unless McAfee is disabled. All these computers are on the same network. Right now these computer users are disabling McAfee every time they want to shut down or use IE 5.5. Any suggestions would be greatly appreciated.