The file m56pug4m.dll is an unknown dynamic link library file. When you find an unknown file on your system, you should always run your security software to check for viruses and other malware. There are thousands of dynamic link library files on your machine, and the vast majority of them are completely legitimate. But sometimes a virus or spyware will use a dll file to hide nasty code, so running a check is a good idea. To check for spyware and other malicious programs, we recommend running a free scan from SpyZooka.
If you are certain your computer is not infected with malware, an error with this file may be caused by a problem in your registry. The registry is the database that Windows uses to keep track of the files installed on your computer. Errors in the registry lead to programs not working. ZookaWare PC Cleaner cleans up your registry for you. It is guaranteed to find and fix every problem in your registry. Run a free ZookaWare PC Cleaner scan to see what your registry needs.