Chocolatey Preinstaller Checks Extension

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### [choco://chocolatey-preinstaller-checks.extension](choco://chocolatey-preinstaller-checks.extension)

To use choco:// protocol URLs, install [(unofficial) choco:// Protocol support ](https://chocolatey.org/packages/choco-protocol-support)

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## **Chocolatey Preinstaller Checks Extension** is a Chocolatey extension that intercepts and runs checks before installing or uninstalling a program. This extension will start working automatically once installed and does NOT need to be implemented by package creators/maintainers. **Chocolatey Preinstaller Checks Extension** is meant to be installed and used directly by Chocolatey end users.

### PURPOSE:

This extension attempts to head off problems related to:

* [https://github.com/chocolatey/choco/issues/544](https://github.com/chocolatey/choco/issues/544)

* [https://github.com/chocolatey/choco/issues/619](https://github.com/chocolatey/choco/issues/619)

* [https://github.com/chocolatey/choco/issues/761](https://github.com/chocolatey/choco/issues/761)

* [https://github.com/chocolatey/choco/issues/780](https://github.com/chocolatey/choco/issues/780)

* [https://github.com/chocolatey/choco/issues/1526](https://github.com/chocolatey/choco/issues/1526)

* [https://github.com/chocolatey/choco/issues/1548](https://github.com/chocolatey/choco/issues/1548)

* [https://github.com/chocolatey/choco/issues/1579](https://github.com/chocolatey/choco/issues/1579)

* and possibly others until such time that Chocolatey natively handles these issues better and this extension becomes moot. (Rumored to be 1.0.0 milestone)

**Chocolatey Preinstaller Checks Extension**'s main purpose is to fend off specific types of problems before they occur. Currently Chocolatey (choco.exe) is not multi-instance friendly. If you try to install or uninstall packages using choco.exe in two Command Prompts at the same time, strange (bad!) things may occur. **Chocolatey Preinstaller Checks Extension** can avoid these strange (bad!) things by intercepting calls to install and uninstall programs and warn about the situation, wait for previous instances to finish, or abort; totally configurable. **Chocolatey Preinstaller Checks Extension** also checks Windows Installer to see if it's busy and will warn, make MSI installer and uninstaller programs wait until Windows Installer has finished processing the other program, or abort. **Chocolatey Preinstaller Checks Extension** only runs before PROGRAM installations and uninstallations. It does not perform any functions related to portable packages or other choco commands.

### FEATURES:

* **Chocolatey Preinstaller Checks Extension** is completely configurable to warn, wait, or abort.

* **Chocolatey Preinstaller Checks Extension** will check if there is a pending reboot…