This article discusses the use of Windows Process Explorer to determine some causes of high CPU usage.
Process Explorer is a Microsoft tool that works as an in-depth task manager. You can use it to determine if any processes on a machine are consuming too many resources. If your backups are running very slowly or if backups continue to time out, use this tool to help determine the cause.
Use this link to download Process Explorer v15.3:
Below are some resources regarding how to use the Process Explorer when troubleshooting an issue: