Mac WindowServer randomly starts hogging CPU

Try running the third party app EtreCheck which will provide us with some of your laptop's details and configuration as well as performance metrics and summaries of system logs which may contain some clues. This app can be run from the Downloads folder and will not install anything as long as you do not allow it to check for updates.

If this laptop is being managed by your employer, then there probably is very little you can do so your best option will likely be contacting your employer's tech department for assistance. The usual culprits are anti-virus apps, cleaning/optimizer apps, and third party security software. If a computer is being managed, then many times it will be running some of these apps.

You post the entire report (full access should have been granted) here using the Additional Text button.

But as this computer is a company asset, you really need to let your IT department handle it. In my former company, tampering with company owned equipment was a firing offense.