You can use the web-based versions of Word and Excel for free via a browser, which requires no installation and works on any operating system.
A known source for repacked software, often found on file-sharing sites and forums. Security and Legal Risks You can use the web-based versions of Word
Likely refers to "Retail" versions, though these are often converted to Volume License (VL) versions by the installer for easier activation. leaving your system vulnerable.
Unofficial builds can be stripped of essential components or lack the ability to receive official security updates from Microsoft, leaving your system vulnerable. You can use the web-based versions of Word