Create a new DWORD value, or modify the existing value called 'NoControlPanel' set the value to equal '1' to enable the restriction.

Exit your registry, you may need to restart for the changes to take effect.
Registry Settings
User Key: [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\
Explorer]
System Key: [HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\
Explorer]
Value Name: NoControlPanel
Data Type: REG_DWORD (DWORD Value)
Value Data: (0 = disable restriction, 1 = enable restriction)

For IE default home page I am not to sure on how to disable the ability to change that.

To hide Network Neighbourhood
Entire Network is an option under Network Neighborhood that allows users to see all the Workgroups and Domains on the network. Entire Network can be disabled, so users are confined to their own Workgroup or Domain.

Open your registry and find the key below. You may need to create the key if it does not already exist.

Create a new DWORD value, or modify the existing value, called 'NoEntireNetwork' and edit the value according to the settings below.

Exit your registry, you may need to restart or log out of Windows for the change to take effect.

(Default) REG_SZ (value not set)
NoEntireNetwork REG_DWORD 0x00000001 (1)

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\...

Registry Settings
User Key: [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\
Network]
System Key: [HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\
Network]
Value Name: NoEntireNetwork
Data Type: REG_DWORD (DWORD Value)
Value Data: (0 = disabled, 1 = enabled)

For more info on all of this check out http://www.winguides.com/registry/category.php/4/
Thanks,
Dave
networkdesigner.net