I downloaded McAfee Personal Firewall Express v4.5 to my computer. Since I have done this, my computer sometimes freezes when I boot up. When it freezes, I hit Ctrl + Alt + Dlt. It says that Microsoft Office Shortcut Bar Not Responding. When this happens, I turn off the computer and reboot the computer. This usually corrects the problem. How can I solve this problem; I don't want to have to reboot my machine everytime I turn it on. It runs Windows 98 and Microsoft Office 97.