I'm visiting my family and currently using my mom's laptop, which has Windows 8. I installed Calibre on her latop but when I plugged in my Nexus 7 to transfer books, it doesn't show up in Calibre. The computer itself recognizes my tablet when I connect it via USB. So I'm confused as to why Calibre isn't showing it.

Is this an issue that occurs when using Calibre on Windows 8? My own laptop has Windows 7 and I have never had this issue.