If you manage to find a file labeled "XLSTAT Full Portable Mega" and download it, here is what you are actually risking.
If you use a pirated "XLSTAT portable" on a work computer, your company’s IT department can be alerted via network monitoring. Companies like Lumivero (XLSTAT’s publisher) actively pursue legal action against organizations using unlicensed software, leading to fines that far exceed the cost of a license.
You do not need to risk your computer’s security or your academic integrity. Here are legitimate alternatives to the fake "XLSTAT full portable mega."