Introduction
This article covers the steps required to install SMP 8.1 RU4 after installing SIM on a Windows Server 2012 R2 Standard Edition system running SQL Server 2016 Standard Edition that was fully updated as of early December 2017.
It will also go over a number of verification steps that will help you validate the install.
Installation
Install New Products:

Optional Installations:

Install Location:

End User License Agreement:

Install Readiness Check:


After the requirements had been installed by SIM as well as manually:

Notification Server Configuration:

Application Pool:

Database Configuration:

Review Installation Details:

Once you get to this point you need to wait until all files have been downloaded and validated before pressing the [Begin install] button.
Installing Software:

Once the components are installed they get configured:

Back up Notification Server Cryptographic Keys:


Installation Complete:

Verification
Web Console loads successfully:

Installed Products:

Application Pools:

Web Site applications:

Scheduled Tasks:

Services:

Processes:

Shares:

Symantec Management Agent:

Conclusion
This article has taken you through the installation steps required to install SMP 8.1 RU4, as well as covered a number of verification steps that will help you validate the installation.
A CMS 8.1 RU4 article can be found here.