How to lock the home page in Internet Explorer

Click on Start->Run and type notepad.
Notepad program will be opened. Now copy and paste the whole code below and save it as HomePageLock.reg.

Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Internet Explorer\Control Panel]
"HomePage"=dword:00000001
[HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet Explorer\Control Panel]
"HomePage"=dword:00000001
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer]
"NoSaveSettings"=dword:00000000
Double click the HomePageLock.reg file and click ok to write it to the registry.