It seems like the printscreen-key misbehaves if you type ctrl-c. It's easy to check.
Or did somebody install a keyboard-remapper maybe?
Of course, if it happens also if you ue Edit>Copy or the Copy icon in the toolbar, it's a different story. And if it only occurs in Office-programs, and not in Notepad and IE, it's also a different story.
But that's not fully clear from your post.
Is anyone having this problem? Whenever I copy any item, my clipboard is being loaded with a page snapshot. If I clear all, the clipboard fills up again. It seems like a virus, but I cant find a fix for it.