If you are looking for MS Office but are worried about size or cost, consider these safer, official routes:

To reach such a small size, critical system files, help documentation, and advanced features are typically stripped away, leading to frequent crashes.

How they achieve small size (technical summary)

Searching for "MS Office 2013 highly compressed 100MB" often leads to third-party websites claiming to offer a "miracle" compression of the full software suite. While the idea of a 100MB installer is tempting, it carries significant risks and technical limitations. 1. The Reality of Office 2013 File Size

Some underground repackers create stripped-down installers that remove everything non-essential. The result? An unstable, feature-missing version of Office that might launch Word but will crash when you try to insert an image or run a spell check.

If you already own a legitimate license key for Office 2013 Professional Plus (e.g., from an old MSDN subscription or a retail purchase), here is how to get a compact, safe installation:

Downloading software from unofficial, third-party sources—especially those promising extreme compression—poses several dangers: Disk Size Used after installing Office 2013 - Microsoft Q&A