Im in need of some help. Im currently running an Acer Apsire 5334. My issue is that in my sound settings im missing the line in option in the recording tab. I don't know what the problem is and would like some help. Please and thank you. Here i have provided a pictureLink Removed
I don't really see a line in input on your laptop.
Do you show the Realtek control panel in the Windows Control Panel? If so, there may be a folder on the upper right corner you can click and get options about how to assign inputs..