You are probably looking for a direct download link to a Windows 7 ISO file (Installation disc image) because Microsoft has officially ended support for Windows 7, making it difficult to find legal, direct downloads from the official Microsoft website.
If you have landed on this page, you are likely searching for the exact phrase: "Index of Windows 7 ISO." This specific combination of words is a classic "Google dork"—a search operator used to find directory listings on vulnerable or misconfigured web servers. Index Of Windows 7 Iso
Leave the "index of" directories to the data hoarders and security researchers. Your identity and bank account are worth more than a five-minute download. You are probably looking for a direct download
A typical result looks like this: