The Officials and sometimes online government sites use Hindi language as the medium for making documents, spreadsheets, presentation. However if you have a English keyboard then it gets tough to type Hindi on your PC and notebooks. Some companies started making Hindi keyboards but it will only be used for typing and cannot be used for general operations of the computer. But a software can be used to convert your English keyboard inputs to Hindi language some of them are Hindi Indic IME, GST OT typing tool. The software is free and is generally used by the Government Officials.
GST OT typing tool is not a freeware but if you want it, you can buy it from cdac.in
Hindi Indic IME – Download Link: Hindi Indic IME 32bit, Hindi Indic IME 64bit
Step 1: Unzip the file run setup.exe
Step 2: Follow the instructions and complete the installation
Step 3: Right-click your Desktop taskbar, and point to Toolbars. See is Language bar selected, if not click on it to select. In Windows 8 you will see a keyboard icon in the task-bar.
Step 4 : Click the keyboard icon and a Keyboard will open up now you can select the Hindi keyboard whenever you want it..
For full guide on installation on Windows XP, Windows 7, Windows 8. Download Hindi Indic IME User guide