Thanks for the replies! I should have been more precise from the beginning, so...

I use a laptop, running WinXP Pro as a power user, and Moz is my preferred browser.

At work I hook up to the network (broadband, a T1, I believe) and the autoupdate won't work; double-click the icon, choose update, I get an error message, along the lines of "cannot establish an automatic internet connection | check proxy settings".

At home, I run the same setup, but on DSL, and I get the same error message. However, on my Win98SE machine the autoupdate works just fine...that's why I suggested that AVG (free edition by the way) doesn't play well with broadband and WindowsXP Pro.

As far as the CPU usage, it happens when I get to the download page, and when the download begins. And yes, it *is* a Moz process, according to the Task Manager, and continues to run high until I close the tab. When I close the tab, everything's fine...just never ran into anything like this before, thought I'd mention it and find out if anyone else has seen this happen, and maybe offer some explaination.

Thanks again....