docs: added a section to the troubleshooting guide (#2916)

docs/content/troubleshooting/cli-installation-errors.mdx

@@ -15,6 +15,22 @@ You can check out more information in [NPM’s documentation](https://docs.npmjs
 
 <!-- vale off -->
 
+## Powershell Error: command not found: medusa
+
+<!-- vale on -->
+
+If you're using Powershell and you installed the CLI tool, but when you try to use it you get the error:
+
+```bash noReport
+command not found: medusa
+```
+
+Try closing your Powershell window and opening a new one.
+
+---
+
+<!-- vale off -->
+
 ## Yarn Error: command not found: medusa
 
 <!-- vale on -->
@@ -46,4 +62,4 @@ setx path "%path%;c:\users\YOURUSERNAME\appdata\local\yarn\bin"
 </TabItem>
 </Tabs>
 
-You can learn more in [Yarn’s documentation](https://classic.yarnpkg.com/en/docs/cli/global#adding-the-install-location-to-your-path).
+You can learn more in [Yarn’s documentation](https://classic.yarnpkg.com/en/docs/cli/global#adding-the-install-location-to-your-path).