For those wondering why Windows catroot files are on the Sandboxie, this thread explains why:
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I check the folder on occasion to see if there are attempts to infect the system. When I investigated, I found the catroot files, which is strange because they should have nothing to do with Ren'Py or Sandboxie.
I have checked the Windows file and the Sandboxie file hashes; both were identical, which was good because it meant there was no malicious attempt to replace the two files. It still didn't explain why they were there, though. So I went through the Sandboxie ticket reporting to see if there was any record of them.
Where I found the ticket, apparently they are moved by default without requesting access because otherwise Sandboxie will put a lock on them and cause Windows Update to fail. I thought I would just throw it into the thread in case anyone wonders why the files are there.