Which version of IE (from Help About) and Windows are you using? Which
language version of Windows and IE are you using? Could you post an example
url of a Web site that does not show Hindi characters?
As an example, the following page should show Hindi characters:
http://www.bbc.co.uk/hindi/. Notice that the source contains <meta
http-equiv="Content-Type" content="text/html; charset=utf-8">, so one
possible problem that may be related to the problem you are seeing is that
the pages you are visiting may not be using the correct charset.
Please post the above requested information so we can investigate.