Hi Digesh, please download ans use the following file:
http://service.sap.com/installations
--> Installations and Upgrades
--> Browse our Download Catalog
--> SAP NetWeaver and complementary products
--> SAP NetWeaver
--> SAP NETWEAVER 7.4
--> Installation and Upgrade
--> Microsoft Windows
--> ORACLE Database
--> 51046232_2 - SAP KERNEL 7.40 UC Windows Server on x64 64 Bit
Regards,
Americo.