Kovid,
As an alternate idea, could a sandbox and/or
Window's UAC cause the same type of error response?
I'm kind of thinking that maybe while Maverynthia was busy a dialog asking for permission was either denied or completely missed. The lack of approval back then is being remembered, and the UAC/sandbox is quietly continuing to deny the request, without asking again.
Maverynthia,
I just enabled Google Image Search and tried to find a missing book cover for one book. I got responses from each site (Amazon, B&N, Google, Google Image, etc) after waiting a few minutes for the request to be processed. None of them were appropriate, but the request was honored without causing any errors.
My calibre settings are "almost stock" in that I just got this computer 2 months ago and I really haven't customized any settings/preferences/tweaks yet. After spending hours each day editing metadata previously, I got burned out and have been taking a break. So if it's not an antivirus, maybe it is a custom setting?
Hmm... Sorry, kind of grasping at straws

, hoping that it reveals something.