~ded171.tmp is a temporary file. It can be found in the temporary folder on Windows, and it runs through the Windows registry.
The Windows registry is a database that directs ~ded171.tmp and other process files. Windows would run extremely slow if not for this database. Without it, process files would use up a great deal of time, RAM, and processor speed as they looked for the programs and hardware they are supposed to interface with.
Unfortunately, this registry can become damaged, cluttered, or otherwise corrupted without the user ever knowing about it. This can be due to a variety of factors, none of which are the user’s fault. The important thing is to get these problems fixed, because they will first slow down the computer, and eventually can even cause a system crash!
The registry can be cleaned by hand, or a special software can be used. ZookaWare PC Cleaner is was developed for this purpose and offers free scans at www.ZookaWare PC Cleaner.com.