VM Default Size Enhancement Update

Author: anishtrakru

articles/devtest-labs/devtest-lab-add-vm.md

@@ -40,9 +40,11 @@ You need at least [user](devtest-lab-add-devtest-user.md#devtest-labs-user) acce
            - If the **Image Base** selected during VM creation has ARM64 architecture, then the default size selected is **D4pls_v5**.
        - If the **Configuration and policies** -> **Allowed virtual machine sizes** list only has limited **Selected sizes**, then:
            - If the **Image Base** selected during VM creation has x64 architecture and D4s_v5 VM size is selected in the **Allowed virtual machine sizes** list, then the default size selected is **D4s_v5**.
-           -  If the **Image Base** selected during VM creation has x64 architecture and but D4s_v5 VM size is not selected in the **Allowed virtual machine sizes** list, then the default size selected is the first VM size in the **Allowed virtual machine sizes** list that can be used for the selected image base.
            - If the **Image Base** selected during VM creation has ARM64 architecture and D4pls_v5 VM size is selected in the **Allowed virtual machine sizes** list, then the default size selected is **D4pls_v5**.
-           - If the **Image Base** selected during VM creation has ARM64 architecture and D4pls_v5 VM size is not selected in the **Allowed virtual machine sizes** list, then the default size selected is the first VM size in the **Allowed virtual machine sizes** list that can be used for the selected image base.
+           -  If the **Image Base** selected during VM creation has x64 architecture but D4s_v5 VM size is not selected in the **Allowed virtual machine sizes** list, or if the **Image Base** selected during VM creation has ARM64 architecture but D4pls_v5 VM size is not selected in the **Allowed virtual machine sizes** list, then:
+               - if a 4 core non-premium CPU size is available, then the first available 4 core non-premium CPU size is selected by default
+               - if no 4 core non-premium CPU size is available, then the first available 4 core CPU size is selected by default
+               - if no 4 core CPU size is available, then the first available CPU size is selected by default
    - **Allow hibernation**: Select this option to enable hibernation for the virtual machine. If you enable Hibernation, you also must select **Public IP** in the Advanced settings as Private and Shared IP are currently not supported if Hibernation is enabled.
    - **OS disk type**: Keep the default value for the base, or select a different option from the dropdown list.
    - **Security type**: Select **Trusted Launch** to enable it for Gen2 VMs. On selecting Trusted Launch When the options Secure boot, vTPM, and Integrity Monitoring appear, select the appropriate options for your deployment. For more information, see [Trusted Launch-enabled security features](https://learn.microsoft.com/azure/virtual-machines/trusted-launch#secure-boot).