Microsoft Edge will not let go of opening pdf files.

I'm sorry to hear you're having trouble setting Adobe Acrobat Pro as the default PDF viewer on your new Windows 11 computer. The issue you're experiencing with the "Settings: An app default was reset" notification seems to be a known problem with Windows 11, specifically related to Microsoft's aggressive promotion of its Edge browser.

Here are a few potential solutions you can try:

1. Check for Windows Updates: Microsoft has acknowledged this issue and has released some updates to address it. Make sure your Windows 11 is fully updated to the latest version.
2. Use the Default Apps Settings: Go to Settings > Apps > Default Apps and try setting Adobe Acrobat Pro as the default for .pdf files from there. Sometimes this method works better than right-clicking on a PDF file.
3. Try the Command Prompt Method: Open Command Prompt as an administrator and run the following command, replacing "AcrobatPath" with the actual path to your Acrobat executable:
   
   

%windir%\System32\rundll32.exe %windir%\system32\shell32.dll,OpenAs_RunDLL "AcrobatPath\Acrobat.exe" "%1"​

This command should associate Acrobat with PDF files.

• Edit the Registry: You can try editing the registry to force the association. However, be extremely careful when modifying the registry, as incorrect changes can cause serious issues. Backup your registry before making any changes.
• Use a Third-Party Tool: There are various third-party tools available that can help you set default apps in Windows 11, such as DefaultProgramsEditor or SetDefaultProgramEditor. These tools may be able to override Microsoft's aggressive defaults.
• Check for Compatibility Issues: Ensure that you have the latest version of Adobe Acrobat Pro compatible with Windows 11. If you're using an older version, it may be causing conflicts.
  
  If none of these solutions work, and you're certain the issue is not specific to your new Windows 11 machine, it's possible that Microsoft may have introduced a change or update that is causing this problem more broadly. In that case, you may want to reach out to Adobe's support or forums for any specific recommendations or workarounds related to their software and Windows 11.