---
title: Pre-Installation
slug: legacy-docs/4uFa-pre-installation
docTags: 
createdAt: 2025-03-11T06:56:56.992Z
---

Complete these steps before running the BSNEE Upgrade Installer:

1. If your BSNEE Web Services node is using a self-signed certificate, you will need to switch to a certificate signed by a certificate authority (CA) before upgrading BSNEE. An example of a free CA service can be found [here](https://letsencrypt.org/).
2. Stop the following BSNEE services (the installer will start them automatically after the upgrade is complete):
   - BSNEEScheduler
   - BSNEESubscriber
   - BSNEEDeviceScreenshotsProcessor
3. Ensure that there is at least 5GB of free space on the C: drive. The installer will also indicate an error if there is not enough space.
4. Ensure that the MIME types listed [here](docId:8POPegKG009RlarNFepo6) are registered with the IIS persistent storage web server.