How to Allow or Prevent the Color Scheme to be Changed in Vista

Information
This will show you how to allow or prevent the Color Scheme in the Apearance Settings window to be changed for all users. By default, the color scheme is allowed to be changed.

Note
This is for the Windows Aero (All Vista editions except Home Basic), Windows Vista Standard (Only the Vista Home Basic edition), Windows Vista Basic, Windows Standard, Windows Classic, High Contrast White, High Contrast Black, High Contrast #2, and High Contrast #1 color scheme options depending on your edition of Vista.
EXAMPLE: Color Scheme Set to Allow and Prevent from being Changed
NOTE: For how to change these settings, see: How to Change the Color Scheme in Vista
OPTION ONE
Through the Local Group Policy Editor
1. Open the
all users,
specific users or groups, or
all users except administrators Local Group Policy Editor for how you want this policy applied.
2. In the left pane, click on
User Configuration,
Administrative Templates,
Control Panel,
Display, and
Desktop Themes. (See screenshot below)
3. In the right pane, right click on
Prohibit Theme color selection and click on
Properties. (See screenshot above)
4. To Allow Color Scheme Change A) Select (dot) Disabled or Not Configured and click on OK. (See screenshot below step 5A)
B) Go to step 6.
5. To Prevent Color Scheme Change A) Select (dot) Enabled and click on OK.
6. Close the Local Group Policy Editor window. Your done.
OPTION TWO
Using a REG File Download
1. To Allow Color Scheme Change A) Click on the Download button below to download the file below.
Allow_Color_Scheme_Change.reg 
B) Go to step 3.
2. To Prevent Color Scheme Change A) Click on the Download button below to download the file below.
Prevent_Color_Scheme_Change.reg 
3. Click on
Save, and save the
.reg file to the
Desktop.
4. Right click on the downloaded
.reg file and click on
Merge.
5. Click on
Run,
Continue (UAC),
Yes, and then on
OK when prompted.
6. When done, you can delete the downloaded
.reg file if you like.
OPTION THREE
Manually in Registry Editor
1. Open the Start Menu.
2. In the white line (Start Search) area, type
regedit and press
Enter.
3. Click on the
Continue button in the UAC prompt.
4. In regedit, go to: (See screenshot below)
NOTE: If System is not here, then right click on Policies and click on New and Key. Type System and press Enter.
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System
5. To Prevent Color Scheme Change A) In the right pane, right click on a empty area and click on
New and on
DWORD (32-bit) Value. (See screenshot above)
B) Type
NoColorChoice and press
Enter.
C) Right click on
NoColorChoice and click on
Modify. (See screenshot below)
D) Type
1 and click
OK. (See screenshot below)
E) The registry will now look like this. (See screenshot below)
F) Go to step 7.
6. To Allow Color Scheme Change A) In the right pane, right click on NoColorChoice and click on Delete. (See screenshot above)
B) Click on Yes to confirm deletion.
7. Close regedit.
That's it,
Shawn