z.fmt is a file that may be a corrupt or missing file on your computer. The best way to find out exactly what is going on with this file is to have it scanned by a trusted registry cleaner. Registries are somewhat vulnerable to errors simply because of the nature of the work they perform. It is quite common. However, not taking care of these errors can cause harm to your computer.
ZookaWare PC Cleaner is a company that you can trust. It comes from the makers of SpyZooka, the popular spyware remover program. ZookaWare, the maker of both programs, believes in providing customers with the best software possible. That is why both programs are backed by a 100% satisfaction guarantee. ZookaWare PC Cleaner promises to clear all of your errors or your money back. There is absolutely no risk in trying.