Windows Server 2019 - CPU load increases after disconnecting RDP session

Question

Hello. I have a problem with Windows Server 2019 Datacenter, up-to-date with Windows Update. When I'm connected to the server via RDP, CPU load is very small (7-9%). When I disconnect, the CPU load goes up to around 30-40%. I've experimented with it and being connected via RDP is the only thing that matters - whenever I'm connected, the load is low, whenever I'm disconnected - it rises. It seems that there was a simillar issue with Windows 10 some time ago.

Specs:
i5-2500
No dedicated GPU
Gigabyte P-61-S3
Toshiba HDD SATA2
8GB DDR3

It's a big issue for me, how to fix it?

Answer 1

Hi,
Firstly, please open task manager to check which process or exe takes up a lot of CPU.
Try to set the group policy below:
Local Computer Policy
Computer Configuration>Administrative Templates>Windows Components>Remote Desktop Service>Remote Desktop Session Host>Remote Session Environment>Use WDDM graphics display driver for Remote Desktop Connections -> DISABLED
If the issue still insists, I suggest that we could check for update. If some security updates could be found, installing them to check.
At last, to diagnose the CPU usage issues, you could use WPT to capture CPU Sampling data / Profile. Then analyze the generated ETL file with the Windows Performance Analyzer.
Hope this helps and please help to accept as Answer if the response is useful.
Best Regards,
Carl