I like to keep my temporary file folders empty, so I'm always checking on them to what is in them. Just recently, files such as, AC1A1, AC1A2, AC1A3, AC1A4, AC1A5, and they keep going on and on. The more time that goes by inbetween cleaning temp folders, the longer the list of the AC files gets. I have never seen these before and I'm just trying to figure out if it's something malicious or not.
Here are two screen captures of the files. Thank you.
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