When you right click on the Start Button, you can select Open, Explore or Find.
Open shows your Programs folder. Explore starts the Explorer and allows access to all drives.
Find allows you to search and then run programs. In certain situations you might want to disable this feature.
To remove them:
Start Regedit
Search for Directory
This should bring you to Hkey_Classes_Root \ Directory
Expand this section by clicking on the "+"
Under shell is Find
Delete Find
Scroll down below Directory to Folder
Expand this section under shell
Delete Explore and Open
