Hi
Welcome to Microsoft community.
It seems like you're experiencing two issues: incorrect cursor movement between monitors and inability to interact with windows on the secondary monitor. Here are a few suggestions to troubleshoot these problems:
- Check Display Settings: Make sure the orientation of each monitor is correctly set in the Windows display settings. Right click on your desktop and select Display Settings. In the settings, you can select each monitor and set its orientation. For your secondary monitor, make sure it's set to Portrait. Also, verify that the monitors are arranged correctly in relation to each other in these settings.
- Update Display Drivers: If the display settings are correct, the issue might be with the display drivers. Check the manufacturer's website for the latest display drivers for your laptop and monitors.
- Check USB-C to HDMI Adapter: The problem may be related to the USB-C to HDMI adapter. Try to connect the monitor directly to the laptop, if possible, or try a different adapter.
- Check Monitor Settings: Some monitors have their own settings for orientation. Check if your secondary monitor has such options and if so, make sure it's set to Portrait.
- Reset Display Settings: Try resetting all display settings to their default values. Then, reconfigure your monitors one by one. This can often fix issues that arise due to incorrect or conflicting settings.
If none of these suggestions resolve your issue, please provide more details about your laptop model, monitor models, and the version of Windows you're using.
Best regards
Derrick Qian | Microsoft Community Support Specialist