Hello, Don Nachtwey.
Welcome to Microsoft Community!
Thank you for sharing your incident.
After reading what you have posted, I understand that your Surface Pro device is repeatedly disconnecting from the Internet after updating to Windows 11, as well as your wireless mouse is failing from time to time. And that you have tried many troubleshooting suggestions.
I hate to believe that a single system update could cause damage to your device. So, we are going to start by troubleshooting possible faults at the driver level, please refer to the steps below:
First of all, I would like to know what generation Surface Pro you are currently using in order to provide you with possible driver and firmware installation packages.
Of course, you can also go to the following link to find the firmware package for your model and download it yourself:
Download drivers and firmware for Surface - Microsoft Support
If the issue still persists after installed the driver and firmware, we recommend you run the Surface Diagnostic Toolkit to diagnose your Surface device.
Since you currently have some network environment, you can still try to get support for the following.
Fix common Surface problems using the Surface app and Surface Diagnostic Toolkit - Microsoft Support
To help you get live Surface device detection services, I will provide you with the following guidelines:
- Use your personal Microsoft account (not your organization account) to access the following links:
- Type Surface, press Enter, and click "Contact Support" at the bottom:
- Select Technical Support and select the device model you are currently using in Produce family, then click Confirm:
- You will see contact options for Chat support and Phone support, please contact them during business hours:
I wish you all the best.
Best Regards.
Leo.L - Microsoft Community Support Specialist