The process launched by kl1.sys is part of Kaspersky’s antivirus software. The file is generally related to Kaspersky Unified driver, and also to Kaspersky Anti-Hacker Only driver. The directory of the file is C:\Windows\System 32\Drivers\ kl1.sys. Although this is not a Windows system process, users do not suggest disabling the file from launching with Windows startup because virus intrusions may occur during the startup process. To be able to fully utilize the functions of the file, users also recommend keeping the file running in the background, especially when surfing through the Internet; because virus and malware attacks usually occur through browsing activities. The file has the digital signature of Karspersky Lab, hence; it is deemed as safe to install and run. There have been occurrences of blue screen, but this was found to be due to technical issues related to using older versions of the software which was no longer compatible with the OS. There were no other software-related issues cited by users.

Most non-system processes that are running can be stopped because they are not involved in running your operating system. kl1.sys. is used by Kaspersky Unified Driver, If you shut down kl1.sys, it will likely start again at a later time either after you restart your computer or after an application start. To stop kl1.sys, permanently you need to uninstall the application that runs this process which in this case is Kaspersky Unified Driver, 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 kl1.sys

A process usually a part of an installed application such as Kaspersky Unified Driver, 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 kl1.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 kl1.sys, belongs to, in this case Kaspersky Unified Driver