'You do not have permission to create new tag(s): windows7, windows'

Hi, I'm getting this error when trying to create an article...

VLV

That's by design. Unverified and newbie members aren't allowed to create new tags, only use existing ones. You probably crossed the threshold between a newbie member and a community member (these are our terms for the permissions levels) in those three hours.

By the way, the criteria for promotion from newbie member to community member is 5 or more posts + 5 or more days of membership or 15+ reputation points. Judging by your stats, I'm going to guess that it was the post threshold that you hadn't crossed yet.