If you are looking for a "new" Mediafire link for Office 2013 Pro Plus, follow these safety best practices:
Pre-activated versions may fail to receive critical security patches from Microsoft.
Windows 7, Windows 8, Windows 10, or Windows Server 2008 R2. How to Stay Safe While Downloading If you are looking for a "new" Mediafire
Before you look for a download, ensure your PC can handle the suite: 1 GHz or faster x86- or x64-bit processor. RAM: 1 GB (32-bit) or 2 GB (64-bit). Hard Disk Space: 3.0 GB available.
Modified installers can sometimes lead to crashes or "non-genuine" notifications. System Requirements RAM: 1 GB (32-bit) or 2 GB (64-bit)
A full Office 2013 Pro Plus installer should be roughly 700MB to 900MB. If the file is only a few megabytes, it is likely a downloader containing adware.
DirectX 10 compatible graphics card for hardware acceleration. System Requirements A full Office 2013 Pro Plus
Look for community feedback or comments on the download page to ensure others have had a positive experience. Alternatives to Unofficial Downloads