A proxy server acts as an intermediary between two or more computers, and allows you to make indirect network connections to other network services. The settings for this determine the level of privacy and security for your system, and provide other options, such as accelerating data transfer speeds or bypassing controls. To disable the proxy settings -- and therefore disable access to the Internet -- through the Windows Registry Editor, edit values in specific subkeys for your Internet settings. Microsoft recommends backing up the Registry keys you plan on editing before making any changes.
Click "Start," type "regedit" in the search field and press "Enter."
Expand the "HKEY_CURRENT_USER" hive by clicking on the "+" sign next to it. Continue expanding "Software," "Microsoft," "Windows" and "CurrentVersion," then click on the "Internet Settings" subkey or folder.
View the contents of the Internet Settings folder on the right pane. Double-click on the "ProxyEnable" DWORD value to open the "Edit DWORD Value" window. Change "Value data" to "1" and press "OK" to confirm.
Double-click on the "ProxyServer" string value.
Locate the Registry key or subkey you will modify. For this case, locate the "Internet Settings" subkey.
Right-click on the "Internet Settings" subkey or folder, then select "Export" from the drop-down menu to open a "Save in" box.
Select a place for exporting the key, such as a removable storage device or a folder on your hard drive. To restore the backup, import it back through the Registry Editor's "File" menu.
Proceed with caution every time you make changes to the Registry. Deleting or corrupting key values could jeopardise the stability and functionality of your system.