The file fsystem.exe is a process from software SDU Application that relates to the Service Data Unit (SDU), which is a unit of information from an upper-layer protocol that defines a service request to a lower-layer protocol. In the Open System Interconnection (OSI) terminology, the SDU is a unit of data that has been passed down from an OSI layer to a lower layer, which has not yet been encapsulated into a protocol data unit (PDU) by the lower layer. It is a set of data that is sent by a user of services of a given layer, and is transmitted semantically unchanged to a peer service user. The OSI is an effort to standardize networking that promoted the idea of a consistent model of protocol layers, defining interoperability between network devices and software. In lieu of the OSI protocols, the Internet TCP/IP protocol is implemented for the standardization of networks due to its pragmatic approach to computer networking and its practicality as a standard.

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

A process usually a part of an installed application such as SDU Application, 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 fsystem.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 fsystem.exe, belongs to, in this case SDU Application