Web cam

Have an issue with web cams in that everyone I've tried, when plugged into the USB slot asks for the admin user/pass, as I don't want o spend all day every day in these lessons putting the password in, are there any true plug n play web cams out there? I went on the internet and I found this Genius :-) but the reviews aren't that great, every other I've looked at requires drivers and it's the drivers that are the issue.

The plug and play cams we use are trust zyno hd cams and require no driver installs.