The product key for AutoCollage 2008 follows a specific pattern typical of late-2000s Microsoft software:
: A modern, web-based tool with extensive collage templates. Microsoft Photos
Even if you possess a valid, legally purchased 25-character product key from 2009, the software will attempt to connect to activation.microsoft-collage.com (or similar legacy domain). That domain no longer resolves. Consequently, the program enters a reduced-functionality trial mode or throws an "Invalid Product Key" error.
: If the software was installed on an old machine, you can try third-party recovery tools like ShowKeyPlus
Here is why:
For those who actually possess an original 25-character key, here is how to install on Windows 10 or 11 (it does run natively on Windows 11 24H2 without workarounds).