If you face a Windows Server slow performance issue, you can upgrade the hardware, such as Memory or the Processor. More working suggestions here.

Troubleshooting what can be tweaked, hacked, adjusted, and replaced requires detailed analysis. The Performance Monitor can provide that information in a visual format.

Tutorial on how to open & use Performance Monitor or Perfmon in Windows 11/10. Using this built-in tool, you can monitor the health of your system.