Typing Indian Rupee Symbol in Windows Keyboard.
Microsoft on 18 May 2011, released an update KB2496898 to Windows Vista, Windows Server 2008, Windows 7 and Windows Server 2008 R2 operating systems to include support for the new Indian rupee symbol (₹). This update included font support, locale changes and keyboard support. With the Windows update, it is now possible to use alt code text entry to obtain the Indian Rupee symbol – Alt 8377.
Alt + 8377
Source: Wikipedia