Users may encounter an error message with Intel® Killer™ Control Center or Intel® Killer™ Performance Suite software: Service Not Running or Killer Status: No Killer Adapter Connected instead of normal operation.

There are a few situations in which this error will occur:
If updating the Intel® Killer™ Performance Suite with latest driver package version still does not solve the issue, you will need to investigate why the service is not starting automatically. If the service does not start automatically after the PC hardware reboot, then there is likely another service that is preventing it from starting, or the service is not set to start automatically
You can check to make sure that the service is set to run automatically by following these steps:
For Example:
If the Driver Package Version is 40.25.905.1721 then you will find the Intel® Killer™ Performance Suite Software Version is 40.25.905.172 and 23.160.0.4 for Intel® Killer™ Wi-Fi BE1750 (Windows* 10/11 64-bit) or10.75.324.2025 (Windows* 10 64-bit),1125.24.318.2025 (Windows* 11) for Intel® Killer™ Ethernet E3000, E3100G. That are listed in the Detailed Description of the Driver Package on Intel Download Center.
If the Intel® Killer™ Performance Suite Software, Intel® Killer™ Ethernet and Intel® Killer™ Wireless network adapters are the latest driver version and successfully connected to the network with all Intel® Killer™ Network Services started automatically, then Intel® Killer™ Performance Suite Software will be displaying the Killer Status: Fully Optimized. No action is needed.

Any Anti-virus, security or clean-up software may also filter or blocking the Intel® Killer™ Network Services. Check the software or application to prevent it is blocking the Intel® Killer™ Network Services. Please contact the related software application's support to enable it.
If you still receive the Service Not Running error without any software or application blocking it. Please consider to rollback to previous worked driver or check the latest PC OEM driver for Intel® Killer™ Performance Suite package driver or consider to restore Windows* Operating system.
Check PC OEM BIOS and OEM platforms firmware are updated to the latest.