Hello skytulip33,
Thank you for bringing this up. There are some factors affecting the performance of your mouse on the Surface Book 2 like current OS version, hardware compatibility, updates that are not yet installed, etc. However, to be able to understand the issue better, let us know more details by answering the following questions:
• Were there any other changes made to your Surface aside from the firmware update?
• Can you confirm if those mice are gaming mouse? Did you check if those mice have any softwares/firmwares/drivers installed on your Surface? If so, is it updated as well?
• As for the Microsoft wireless mouse you include, which model? Did you check for the LED status (if available)? How about the battery?
• Also, we would like to know if the issue is noticeable while using it, or after you wake the device from sleep?
To help solve this issue, we'd like to make sure that the Surface is up to date by going to Settings > Update & security > Windows Update then Select Check for updates (Select "Restart now" if prompted). If you have difficulty installing updates from Windows Update, you can download and run the Surface Diagnostic Toolkit. It is a self-healing tool which looks for potential issues and fixes them, as well as ensures your device is completely up to date. The tool takes about 10-15 minutes to run. You can click this link to get started then follow the on-screen instructions.
To troubleshoot the Microsoft wireless mouse, we suggest that you check these steps:
- Unpair then re-pair the mouse.
- Run the Bluetooth Troubleshooter by going to Settings > Update & Security > Troubleshoot. In the list of available troubleshooters, select Bluetooth then click "Run the troubleshooter". Follow on-screen instructions.
- If that doesn't work, proceed to download and run the Surface Diagnostic Toolkit.
- In case that the wireless mouse have no power left, replace the battery. If it's rechargeable, plug in to the device via USB cable.
Keep us posted on the outcome.