Files in C:\Windows\Temp or /tmp are almost certainly safe to ignore or delete.

Below is an overview of how identifiers with this structure typically function in computing environments: Common Interpretations of the Identifier

As of my current data, there is no public open-source project, CVE (vulnerability report), or major software component officially named "rtwc__5133zip." It is highly probable that this is a specific to your system or a particular piece of niche software.