This key is where all the configuration data for the Workstation service is stored. The lanmanworkstation key by default, looks like this on a freshly installed Windows Server 2003 Service Pack 1 machine

As you can see, there’s no “AutotunedParameters?” here. However, there is a "parameters" sub key in which we can do some tuning. It is not uncommon (especially in Terminal Server environments) to have to tune the Workstation service to alleviate performance problems. This is due to the nature of Terminal Servers. My article on MSTerminalServices?.org discusses this in detail, but in a nutshell it’s like this: the workstation service was (and is) designed for a single workstation (like your desktop). However, a Terminal Server can easily host 50 desktop sessions, but unless you do manually intervene this server most likely is still configured just as your desktop would be. It’s pretty obvious that this could lead to some performance problems.

More Info: https://findingtechnologyideas.blogspot.com/2020/03/what-is-lanmanworkstation.html