What is the installed program "Windows Software Development Kit" on my Windows 7 computer? Why it is not visible in Control Panel?

"Windows Software Development Kit" is an installed program on Windows 7 system managed by Windows Installer.

You will not see "Windows Software Development Kit" listed on "uninstall or change a program" in Control Panel, because it is flagged as a hidden system component in the registry (SystemComponent=1).

Information related to "Windows Software Development Kit" installed program:

Name: Windows Software Development Kit
Publisher: Microsoft Corporation
Size: 288120 KB
Version: 8.100.26936
System Component: Yes
Identifying Number: {984022F2-9BCA-A41D-6A38-1AE658F01415}
Install Location: 
Install Source: C:\ProgramData\Microsoft\VisualStudio\Packages\Microsoft.Windows.81SDK.Desktop.Msi,version=8.100.25984\
Install Date: 20170729
Local Package: C:\windows\Installer\1f62a76.msi
Package Name: Windows Software Development Kit-x86_en-us.msi
Uninstall Command: MsiExec.exe /I{984022F2-9BCA-A41D-6A38-1AE658F01415}
Windows Installer: Yes

It is recommended to keep "Windows Software Development Kit" as an installed program.

⇒ "Windows Software Development Kit DirectX x64 Remote" Installed Program on Windows 7

⇐ "Windows SDK for Windows Store Managed Apps Libs" Installed Program on Windows 7

⇑ Hidden Installed Programs using Windows Installer on Windows 7

⇑⇑ Windows 7 Installed Programs