That doesn't really occur with a new device, unless something else you had already installed has removed or overwritten files.
I would suggest using the "System Restore" option to restore it to the point before you installed anything, then try doing updates for the system first. Before installing anything else. Once the system has been fully updated, then try installing other programs.
NOTE: If you installed absolutely nothing before this occurred, then I would be taking the device back and have them exchange it for one without issues.