Search notes:

C:\Program Files

Apparently, this is the default directory for the directory that environment variable %PROGRAMFILES% points to.
Some subdirectories of C:\Program Files might be:
Common-Files
Dolby Digital Plus
dotnet
Hyper-V
Intel
Internet Explorer
Microsoft Analysis Services
Microsoft Office
Microsoft SQL Server
Microsoft SQL Server Compact Edition
Microsoft SQL Server Reporting Services
Microsoft Update Health Tools
ModifiableWindowsApps
Mozilla Firefox
MySQL
Oracle This directory is created, for example, when Windows is installed in an Oracle VirtualBox.
PackageManagement
PCHealthCheck
Realtek
rempl
RStudio
Stellarium
Synaptics
system
Uninstall Information A hidden folder
UNP
VideoLAN
Windows Defender
Windows Defender Advanced Thread Protection
Windows Mail
Windows Media Player A hidden folder
Windows Multimedia Platform
Windows NT
Windows Photo Viewer
Windows Portable Devices
Windows Security
Windows Sidebar A hidden folder
WindowsApps A hidden folder
WindowsPowerShell
7-zip

See also

%ProgramFiles(x86)%
ProgramFilesDir,ProgramFilesPath and ProgramW6432Dir under the registry key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion
The .NET enumeration System.Environment+SpecialFolder.

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