How to Repair High CPU Usage by CSISYNCCLIENT.Exe in Windows Computers

The CSISYNCCLIENT.EXE process is related to Microsoft Office 2013, and the reason for the high memory usage is unknown. Ideally, this bug has been fixed when you run Microsoft Office 2016 if you want to upgrade. However, this is not a free update, so you have to make this decision yourself. Secondly, Microsoft has provided a solution to this problem in the form of a Windows update. Therefore, a Windows update would be helpful.

What is the cause of CSISYNCCLIENT.EXE high CPU load?

We can only speculate that this problem may be caused by software incompatibilities, viruses, malware, corrupt registry entries, and the like. Nevertheless, it is obvious that the high CPU consumption of CSISYNCCLIENT.EXE significantly reduces the system performance, so Windows session startup and shutdown may take a long time, programs loading may be very slow, web-browser constantly hangs, etc.

How to eliminate high CPU load from CSISYNCCLIENT.EXE?

Install Windows Updates

  1. Open the Start menu > click Settings > click Update and Security.
  2. Click Windows Update in the left pane and Check for Updates in the right pane.
  3. Wait for Windows Update to search for available updates for your computer.
  4. Download and install all available Windows updates for your computer.
  5. Reboot your computer and see if the problem persists when you start your computer.

Perform System Restore

  1. Press the Windows logo key + R to open the startup window.
  2. Type rstrui.exe in the Run dialog box and press Enter to launch the system restore utility.
  3. Click Next.
  4. Click the desired restore point in the list to select it, then click Next.
  5. Be sure to select a restore point that was created long before the strange circle appeared on your desktop.
  6. In the Confirm recovery point screen, click Done.
  7. In the dialog box that opens, click Yes to begin restoring your system.

Frequently Asked Questions

  1. Reboot your system.
  2. Stop or restart processes.
  3. Update the drivers.
  4. Scan for malware.
  5. Power options.
  6. Reinstall Windows.

There are many reasons for high CPU utilization - and in some cases, they are surprising. The slow processing speed may be caused by an anti-virus program you're using, or by a virus that that program needs to stop. Try running a scan with multiple anti-virus tools or manually removing the virus.

If you have a faulty power supply (laptop power cord, desktop power supply), it may automatically start lowering the CPU power to save power. With insufficient power, your processor may only run at a small fraction of its full power, which can lead to 100% CPU usage in Windows 10.