Everything you see on the startup tab in msconfig can be found in the registry.
Currently enabled items (those with a check in the box) can be found in one of two places.
There is a section for the local MACHINE and there is a section for the currently logged in USER.
The startup items that apply to the local machine can be found here:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run.
Startup items that apply to the currently logged in user can be found here:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
You can tell which section of the registry the items are in by looking at the Location column in msconfig.
The enabled startup items will start with either HKLM or HKCU (look at your example).
So if I wanted to delete the currently enabled entry for an HP printer that belonged to the current USER (HKCU) I would do this in the registry editor:
Since there is no undo or quit without saving in the registry editor you should consider how you are going to undo the adjustments if you make a mistake and your system malfunctions or no longer boots the next time it is restarted.
Before making any registry adjustments do this:
Create a manual System Restore point.
Consider backing up your registry with this popular free tool: