Many people think that the Windows operating system itself has a registry. This registry is not the same thing that the admin pc use. The registry is only used by Windows when programs need access to registry information to load. The registry is designed to help the system run faster but sometimes causes problems because it tends to become too large. The size of the registry affects the performance of windows because it has to read 100's of files from the registry to process information.
The good news is that with an Admin PC you don't have to worry about making the wrong kind of settings that can cause your PC to slow down. An admin PC will load programs much faster because it doesn't have to read the whole registry. Instead it loads programs one at a time in the order that they have been installed on the computer. This means if you uninstall a program on the desktops and then install another app on the laptops you will see the new program running much faster than before. It also means that if you remove an app that was running on the desktops but never installed on the laptops you will still see the program running. This helps the windows operating system continues to run as efficiently as possible.