Ok... If you want to remove the "Documents" & "Help and support" options in the start menu you are going to have to edit the registry.
Important: Back up your registry in case a mistake is made.
While in the registry, when indicated to "Export the key to the desktop" you will need to right click the folder in the left pane and select export, name it accordingly and save it to your desktop.
If you encounter problems from changes that are made you will be able to fix simply by double clicking the new .reg file on the desktop and allowing the merge.
Remove documents from start menu
Click on Start > Run and type in:
regedit
and hit enter.
Navigate / drill down to :
HKEY_CURRENT_USER \ Software \ Microsoft \ Windows \ CurrentVersion \ Policies \ Explorer
"Export the Explorer key to the desktop"
In "Explorer" look in the right pane - double click on No RecentDocsMenu and set the Value Data to 1. Click OK, and close registry editor.
You may need to reboot the pc for the change to take affect.
Remove Help and support from start menu
Click on Start > Run and type in:
regedit
and hit enter.
Navigate / drill down to :
HKEY_CURRENT_USER \ Software \ Microsoft \ Windows \ CurrentVersion \ Policies \ Explorer
You have already exported the Explorer key to the desktop. Keep this until you are satisfied with the outcome.
Right click a blank area in the right pane and select "New" > "DWORD Value". Name it:
NoSMHelp
Double click the new entry and give it a value of 1.
Again right click a blank area (in the right pane) for another new DWORD value and name it:
NoHelp
Double click the new entry and give it a value of 1.
Reboot the pc to see if the desired settings have taken effect.
Please take care when working in the registry, it is a literal minefield to walk through. If you are unsure of any of the steps please allow us to clarify.