Delete old files in a folder automatically, with Auto Delete
Auto Delete is a free tool that will let you delete files automatically from a particular folder, if they are older than a time you can decide at will.
The program checks their modification time to determine what should be deleted.
You can have it run on startup to delete old temp files, backups, webcam snapshots history, temporary internet files, etc.
The (serious) problem is that you can not define more than one folder as an auto-delete target.