Sneaky little guy
Internt explorer keep a record of all sites that have been vistied. This record can be months in length. This can be handy in tracking what the computer has been used for. Those trying to hide what the have done will usually clear this option be leaving the computer. Now you are not able to see what they have done. What to do? Take away their ablitlty to clear that log!
Take that away from them
Open the Registry Editor.
1. Navigate to the following string:
HKEY_CURRENT_USER\Software\Policies\ Microsoft\Internet Explorer\Control Panel
2. If you get to the Microsoft key folder and don't see keys for Internet Explorer\Control Panel, you'll need to add Internet Explorer as a subkey of Microsoft and Control Panel as a subkey of Internet Explorer.
3. Go into the Internet Explorer key folder and create a new DWORD value (REG_DWORD). Name it Control Panel. Right-click the Control Panel value and choose Modify. Change the data from 0 to 1.
Immediately, your "Clear History" options will become grayed out in your IE Tool menu. When you open the History menu, you'll no longer see an option to delete selected URLs by right-clicking them. If the tweak isn't working for you, close and relaunch any instance of IE you have running.