It may be a stripped-down, unauthorized "portable" version that runs without installation but crashes frequently.
Instead of risking your digital safety, you can obtain a legitimate copy of Office 2013 through several reliable methods.
Microsoft offers web-based versions of Word, Excel, and PowerPoint for free. 0 MB (runs entirely in your web browser). ms office 2013 highly compressed 100mb
If you need Office 2013 specifically:
Downloading software that claims to be compressed to less than 10% of its original size often involves significant security risks: Malware & Trojans It may be a stripped-down, unauthorized "portable" version
To make a file that small, crucial files are removed. This results in software that often crashes, refuses to save documents, or lacks essential features like spellcheck.
Requires no installation on your local drive. Auto-Save: Saves your work automatically to Google Drive. 0 MB (runs entirely in your web browser)
Perfect file compatibility, official Microsoft product, allows real-time collaboration. LibreOffice
Microsoft offers stripped-down versions of Word, Excel, and PowerPoint completely free in any web browser. 0 MB (runs entirely in the cloud).