Download DDU software by clicking below link.

http://www.guru3d.com/files-get/display-driver-uninstaller-download,20.html

Please click on below link for steps to login to safe mode.

https://www.youtube.com/watch?v=TwIOazT1BxU

After you have logged into safe mode, Double click on DDU software downloaded to proceed with the installation. After the Display driver uninstaller is installed, it would prompt for system restore point creation and booting the computer in safe mode.
Once done, - Select NVIDIA on top and Put a check mark on all the NVIDIA components near the NVIDIA logo.
- Now click on Clean and Restart- (Highly Recommended)

- Once the computer restarts and goes to the Windows, please follow the steps below
 Yeshwanth: Download the driver version 391.35 WHQL
http://www.nvidia.com/download/driverResults.aspx/132841/en-us
- Once the installer wizard begin, accept the license agreement.
- Select "Custom (Advanced)" install option and then click Next.
- Put a checkmark in the "Perform clean install" option and then click Next.
- Follow the on-screen instructions to complete the installation.