Derek,
A possible reason for this is that some previous installation is pending a reboot that still didn't happen, what may prevent our setup from committing its changes. A way to investigate if that is the case is to reboot and verify if the AutoCollage setup succeeds after that.
Another possibility is for you to have some outdated version of the Windows Installer redistributable. Although that by itself shouldn’t prevent the setup from succeeding, older versions of the Windows Installer are more likely to have issues like the one of pending reboots cited above. You can get the latest version of the Windows Installer redistributable from http://www.microsoft.com/downloads/details.aspx?FamilyID=5a58b56f-60b6-4412-95b9-54d056d6f9f4. After installing it, and very likely rebooting, please retry installing AutoCollage and let us know of the results.
Alisson.Sol