: Files compressed to this extreme size often contain malware, ransomware, or trojans . Cybercriminals frequently use "highly compressed" or "cracked" software as a lure to infect systems.
It is technically impossible to compress modern office software to that size without breaking it, and the files that claim to do so are almost always malware in disguise. ms office 2013 highly compressed 100mb
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For context, early versions of Microsoft Office were tiny by today’s standards: consider these verified options: For context