Sadly, not all errors can be identified easily. The w021f32w.dll error is one of the thousands of DLL files and processes that can cause a registry error. What I can tell you about the w021f32w.dll error message is that it is part of the dynamic link library, and the DLL gets errors all the time.
The dynamic link library works like a big storage bin for your computer’s files. Multiple programs can access the DLL or registry at any given time. Since many programs access the same files, files get damaged and deleted. This damage causes registry errors to occur. Luckily, the damage remains hidden, but occasionally you will get errors like the w021f32w.dll error and will have to do something about it.
Of course, you can prevent registry errors by running a registry cleaner on a regular basis. That is what ZookaWare PC Cleaner is designed to do. ZookaWare PC Cleaner will not only remove current registry errors but will prevent future errors if you run it on a regular basis.