This message was posted on behalf of Intel Corporation
Hello AmirHossein Ahmadi,
I understand that Windows* animations lag when you are using the display at 4k resolution.
Let me apologize for any inconvenience this issue may be causing to you.
In order to help you better I would like to gather more information about the configuration you have in the computer. Please attach to this thread the .txt file the Intel® System Support Utility will generate https://downloadcenter.intel.com/download/25293/Intel-System-Support-Utility
Please also attach the Intel Graphics Driver Report. This link will show you how to generate it https://www.intel.com/content/www/us/en/support/graphics-drivers/000005848.html
Has it worked fine before? Was there any software or hardware change before the issue started happening?
Let me also know if you are using the built-in display of the laptop or if you are using an external display. If you are using an external display let me know the type of video cable you are using.