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Add documentation on how to block installation based on OS & VCREDIST versions #300

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Add documentation on how to block installation based on OS & VCREDIST versions #300

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31 changes: 31 additions & 0 deletions src/Docusaurus/docs/tools/launch-checks.md
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# How To: Block installation based on OS version

It is often desirable to block installation of an application on too old Windows versions. The following sample demonstrates how to block installation on Windows versions prior to Windows 10 version 21H1.

```xml
<Property Id="WINDOWSBUILDNUMBER" Secure="yes">
<RegistrySearch Id="BuildNumberSearch" Root="HKLM" Key="SOFTWARE\Microsoft\Windows NT\CurrentVersion" Name="CurrentBuildNumber" Type="raw" />
</Property>
<Launch Condition="Installed OR (WINDOWSBUILDNUMBER &gt;= 19044)" Message="This application require Windows 10 version 21H1 (build 19044) or newer." />
```

The sample uses the `SOFTWARE\Microsoft\Windows NT\CurrentVersion\CurrentBuildNumber` registry key to detect the current Windows version.


# How To: Block installation on missing or too old VCREDIST

It is sometimes desirable to block installation of an application if the Microsoft Visual C++ Redistributable is either missing or too old. The following sample demonstrates how block installation if the Microsoft Visual C++ 2015-2022 (x64) Redistributable is either missing or predates the 17.2 version.

```xml
<!-- Minimum version obtained by downloading "Visual C++ Redistributable for Visual Studio 2022" (x64) 17.2 from https://my.visualstudio.com/Downloads and checking the EXE file version. -->
<Upgrade Id="36F68A90-239C-34DF-B58C-64B30153CE35">
<UpgradeVersion OnlyDetect="yes" Property="VCREDIST_X64" Minimum="14.32.31332.0" />
</Upgrade>
<Launch Condition="Installed OR VCREDIST_X64" Message="Microsoft Visual C++ 2015-2022 (x64) Redistributable missing or too old." />
```

Where `36F68A90-239C-34DF-B58C-64B30153CE35` is the UpgradeCode associated with the Microsoft Visual C++ 2015-2022 (x64) Redistributable.
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