: Files labeled "highly compressed" on unofficial sites are frequently used as "trojans". These installers often contain malware or "white noise" data to trick you into running an executable that compromises your computer. Functionality Loss
Safer, legal alternatives
Distributing or using pirated software is illegal and can lead to severe fines or criminal charges.
Office 2013 is not freeware. Downloading a cracked, “highly compressed” version is software piracy. Microsoft can issue DMCA takedowns, and in some jurisdictions, ISPs will warn or penalize users for repeated copyright infringement.