Ubuntu on Windows is a Windows 10 app that runs on Windows Subsystem for Linux (WSL) which is an Application compatibility layer for running Linux operating systems natively on Microsoft Windows.
Windows 10 has a couple of mouse control options that allow you to adjust mouse sensitivity so that it will operate exactly the way you want.
Best Antivirus for Ubuntu Server/Desktop is ClamAV. It is a Free Open Source antivirus software solution that works pretty much the same as Windows Antivirus software.
If you want to change the username of a user account, it can be done from the command line using the usermod command.
In Windows, remote desktop is the preferred remote access method. But Windows also supports SSH to access command line interface remotely. If you want to use SSH, you must first install OpenSSH Server.