Please, as not to misunderstand.
Desktop and shutdown reg tweaks do what thay say they do. They don't speedup the system but rather the delay commands that Windows takes to react to open a file or shutdown the system.
Some other tweaks that I inserted in my Tweak file.
NoLowDiskSpaceChecks = Low Disk Notification deactivated
LinkResolveIgnoreLinkInfo = Determines whether Windows traces shortcuts back to their sources when it cannot find the target on the user's system.
NoResolveSearch = Prevents the system from conducting a comprehensive search of the target drive to resolve a shortcut.
NoResolveTrack = Prevents the system from using NTFS tracking features to resolve a shortcut.
NoInternetOpenWith = Specifies whether to use the Microsoft Web service for finding an application to open a file with an unhandled file association.
AutoEndTasks = Specifies whether user processes end automatically when the user either logs off or shuts down Windows
HungAppTimeout = Specifies how long the system waits for user processes to end after the user clicks the End Task command button in Task Manager
MenuShowDelay = Specifies the interval from the time the cursor is pointed at a menu until the menu items are displayed
WaitToKillAppTimeout = Specifies how long the system waits for user processes to end after the user attempts to log off or to shut down Windows.When the time specified in this entry expires, the End Task dialog box appears, stating that the process did not respond.
If the value of AutoEndTasks is 1, the system ends the process automatically.
LowLevelHooksTimeout = This tweak changes the time to wait to kill a service, which is not responding
WaitToKillServiceTimeout = Determines how long the system waits for services to stop after notifying the service that the system is shutting down.