The default value for AssemblyCompany in AssemblyInfo.cs for a new project can be changed in the registry in the value “RegisteredOrganisation” in one of the following keys depending on OS:

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion

HKLM\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion

The default value is “Microsoft” when the operating system is pre-installed.