Command & Conquer and/or Supreme Commander at all?

If so, it's possible those files are to do with that, or those, games.

There's not much information about AgGIF in Google, but I found the link below which mentioned the Prefetch files you listed including AgAppLaunch;

http://answers.microsoft.com/en-us/windows/forum/windows_vista-performance/superfetch-precaches-command-conquer-and-supreme/a72f3d97-fca9-47e7-8778-53db1d355a78

In fact there are more results in Google if you search for AgAppLaunch.

Mark