If manual link hunting seems difficult, a popular community tool called the by HeiDoc.net is widely used. This lightweight program scrapes the official Microsoft download links and presents them in an easy-to-use interface.
The Internet Archive hosts many "untouched" ISO images uploaded by the community. These are often original disc rips. Access to various versions (SP1, 32-bit, 64-bit). Cons: Extremely slow download speeds. 2. Microsoft Windows and Office ISO Download Tool