More details in [this chapter](06-distributed-monitoring.md#distributed-monitoring-setup-sign-certificates-master).
+### Windows Client <a id="upgrading-to-2-8-windows-client"></a>
+
+Windows versions older than Windows 10/Server 2016 require the [Universal C Runtime for Windows](https://support.microsoft.com/en-us/help/2999226/update-for-universal-c-runtime-in-windows).
+
### Removed Bottom Up Client Mode <a id="upgrading-to-2-8-removed-bottom-up-client-mode"></a>
This client mode was deprecated in 2.6 and was removed in 2.8.
## Upgrading the PostgreSQL database <a id="upgrading-postgresql-db"></a>
If you want to upgrade an existing Icinga 2 instance, check the
-`/usr/share/icinga2-ido-mysql/schema/upgrade` directory for incremental schema upgrade file(s).
+`/usr/share/icinga2-ido-pgsql/schema/upgrade` directory for incremental schema upgrade file(s).
> **Note**
>