Hello Arun, the Celeron G1850 processor is part of the Haswell family. ARK | Intel® Celeron® Processor G1850 (2M Cache, 2.90 GHz)
The following URL will show you the correct site from where you can download Intel generic drivers available for your processor. Intel® Download Center
Please look for the Haswell family on the list and it will take you to the drivers.