The web installer above requires an internet connection during installation and may fail on older Windows versions. There is a (approx. 45 MB) floating on archive.org. Search for "Picasa 3.9 offline installer archive.org." This is safer for future reinstallation.
However, none of these replicate the one-two punch of that Picasa 3.9.138.150 delivers. Picasa 3.9.138.150 for Windows
Once installed, this version has several undocumented tricks that elevate your workflow. The web installer above requires an internet connection
You might be asking: "Isn’t this software over a decade old? Why not use Lightroom, Photoshop Elements, or even the native Windows Photos app?" Picasa 3.9.138.150 for Windows