QGIS is available on Windows, macOS, Linux, Android and iOS. FAQ - QGIS
Choose the tab corresponding to your operating system (e.g., Windows, macOS, or Linux). Select your preferred version: download qgis kuyhaa
Once downloaded, run the installer. The default settings are fine for most users. You can optionally choose to install the QGIS Sample Dataset, which is helpful for learning. QGIS is available on Windows, macOS, Linux, Android and iOS
That said, if you still want a for a forum or blog (without promoting piracy), here is a safe version: QGIS is available on Windows