With the service names NDIS5.1 Miniport Driver for Marvell Yukon Ethernet Controller, and Miniport Driver for Marvell Yukon Ethernet Controller, the process yk51x86.sys, which is a type of a driver or SYS file, is a part of the software product called Marvell Yukon Ethernet Controller, also known as NDIS5.1 Miniport Driver for Marvell Yukon Ethernet Controller, which is developed by Marvell. When the program is installed onto the computer, yk51x86.sys is downloaded, stored into a file folder, usually labeled as C:\Program Files, and registered into the Windows registry. The yk51x86.sys file is digitally signed by Marvell Semiconductor - VeriSign Time Stamping Services Signer - G2, and a Windows process, so it is compatible with Microsoft Windows Operating Systems, which may include both new and old versions, such as Windows 8, Windows 7, Windows XP, Windows Vista, Windows Server 2003, Windows 2000, Windows NT, and Windows ME, but regardless, it is recommended to keep the file working and running in the background.

Most non-system processes that are running can be stopped because they are not involved in running your operating system. yk51x86.sys. is used by Marvell Yukon Ethernet Controller, If you shut down yk51x86.sys, it will likely start again at a later time either after you restart your computer or after an application start. To stop yk51x86.sys, permanently you need to uninstall the application that runs this process which in this case is Marvell Yukon Ethernet Controller, 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 yk51x86.sys

A process usually a part of an installed application such as Marvell Yukon Ethernet Controller, 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 yk51x86.sys. 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 yk51x86.sys, belongs to, in this case Marvell Yukon Ethernet Controller