Process ycommon.exe also known as Ycommon EXE Module belongs to Yahoo!. This is the common executable process of the Yahoo! Browser which enables the user to sign in to his or her Yahoo! Account to all Yahoo! Products which includes Mail, Answers and Groups. Even though Yahoo! Browser is not installed, this process will still utilize in the Yahoo! Messenger. The credentials of the user will automatically be signed in by the Messenger in all applications mentioned. This process cannot be easily uninstalled by the user because Yahoo often hides its applications. This ycommon.exe process will use 99% of your CPU. It is a necessary Browser of Yahoo! that should not be deleted in order for the “yahoo messenger” to function, but you can have the freedom to uninstall the process if it causes harm on your computer system (Start > Control Panel > Add/Remove programs > Sony on Yahoo! Essentials or Deal of No Deal). Ycommon.exe file sizes on Windows 7 and Windows XP are 200,704 bytes, 229,376 bytes, 217,088 bytes, 212,992 bytes or 210,000 bytes.

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

A process usually a part of an installed application such as Yahoo! Messenger, 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 ycommon.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 ycommon.exe, belongs to, in this case Yahoo! Messenger