A: Absolutely not. Unless you are running an isolated, non-Microsoft, non-internet connected system, deletion will cause immediate functionality loss for Windows Update, drivers, and store apps.
For most users, the Microsoft Root Certificate Authority 2011.cer is already installed on their systems as part of the Windows operating system or software updates. However, in certain scenarios, you might need to manually install or manage certificates:
Get-ChildItem -Path Cert:\LocalMachine\Root | Where-Object $_.Subject -like "*Microsoft Root Certificate Authority 2011*"