The process SetDefaultMIDI is executed on the machine via the file mididef.exe. This is file comes from the drivers for Audigy and X-Fi audio cards from Creative. Users typically allow the file to run, deeming it as an important driver file for their onboard audio cards. This is usually pre-loaded by the manufacturers or vendors of laptops and desktops. It has a typical file path of C:\Windows\System 32\mididef.exe. There were instances where the file was found to be a virus, based on the personal accounts of several users. The most common observation regarding this detection is that the file may have already been altered or infected by a virus. The legitimate file that comes pre-installed on computers is a valid and safe file. Also, users who disabled the file discovered that their CD/DVD devices were unable to play their discs. The file’s approximate size on disk is 24,576 bytes. The file executes upon startup.

Most non-system processes that are running can be stopped because they are not involved in running your operating system. mididef.exe. is used by SetDefaultMIDI, If you shut down mididef.exe, it will likely start again at a later time either after you restart your computer or after an application start. To stop mididef.exe, permanently you need to uninstall the application that runs this process which in this case is SetDefaultMIDI, from your system.

After uninstalling applications it is a good idea to scan you Windows registry for any left over traces of applications. Registry Reviver by ReviverSoft is a great tool for doing this.

The ReviverSoft experts have not yet reviewed mididef.exe

A process usually a part of an installed application such as SetDefaultMIDI, or your operating system that is responsible for running in functions of that application. Some application require that they have processes running all the time so they can do things such as check for updates or notify you when you get an instant message. Some poorly written applications have many processes that run that may not be required and take up valuable processing power within your computer.

We have not received any complaint about this process having higher than normal impact on PC performance. If you have had bad experiences with it please let us know in a comment below and we will investigate it further.

The first thing you should do if mididef.exe. is causing errors on your computer is to run a Windows registry scan with Registry Reviver If you are still seeing errors after this you should uninstall the program that mididef.exe, belongs to, in this case SetDefaultMIDI