How to Prevent Users From Configuring Proxy Servers in Browsers ( Men-disable Menu atau konfigurasi mem-Block Internet Explorer)

Ini sangat berfungsi untuk mendisable / memblock site tertentu dan settingan Internet Explorer lainnya supaya user tidak bisa men klik tomboltersebut,  seperti contoh mendisable Proxy ( user tidak bisa masukan Ip Proxy).
dan menu di aplikasi bisa di hilangkan seperti Internet Connection di hilangkan dan lain sebagainya.

any businesses choose to block sites they see as time-wasting diversions, such as YouTube, Facebook and Reddit, to remove the temptation to browse these sites instead of working. Enterprising users may figure out that they can use a proxy server to subvert these measures; one way to stop that from happening is to prevent workers from configuring their computers' proxy settings.

Items you will need

• Administrator account

Step 1Press the Windows key to open the Windows 8 Start screen or Windows 7 Start menu. Type "gpedit.msc" without quotation marks and press "Enter" to launch Local Group Policy Editor.

Step 2Double-click "Administrative Templates" under "User Configuration" in the left pane, and then double-click "Windows Components," then "Internet Explorer."

Step 3Double-click "Prevent Changing Proxy Settings" (Windows 8) or "Disable Changing Proxy Settings" (Windows 7) in the right pane.

Step 4Click the radio button labeled "Enabled."

Step 5Click "OK." Users will now be prevented from configuring Windows' proxy settings.

Step 1Press "Windows+E" to launch File Explorer.

Step 2Navigate to the Firefox installation folder, typically C:\Program Files (x86)\Mozilla Firefox or C:\Program Files\Mozilla Firefox.

Step 3Right-click in an empty area of the right pane and select "New," then "Text Document." Name the text document "mozilla.cfg" without quotation marks.

Step 4Copy and paste the following lines into mozilla.cfg:
// lockPref("network.proxy.type", 0);
and then save and close the file.

Step 5Double-click the folder "Defaults" in the Firefox installation directory, then its subfolder, "Pref."

Step 6Right-click in an empty area of the right pane and select "New," then "Text Document." Name the text document "local-settings.js" without quotation marks.

Step 7Copy and paste the following lines into local-settings.js:
pref("general.config.obscure_value", 0); pref("general.config.filename", "mozilla.cfg");
and then save and close the file. This locks Firefox's proxy settings to Windows' proxy settings.