Could be. I think we've discussed this before ... however the "divide by zero" notice doesn't come up or anything. AND ... it doesn't always happen as a result of using Outlook or explorer. Sometimes with other programs ... but not often. I have just learned to reboot whenever I want to use UFT and start fresh with it before going to anything else. THEN I can open e-mail or whatever successfully. Quirky, I know. I've learned to live with it.