You require up to date Windows 7 Professional installation media which has USB 3.0 drivers, storage controllers and ideally incorporates SP2 "the convenience rollup" and IE11. 

In your UEFI BIOS setup you should have a UEFI Boot (Legacy Boot Disabled), with Legacy ROMs Enabled and Secure Boot Disabled.

For more details see here:

http://dellwindowsreinstallationguide.com/windows-oem-faqs-and-downloads/#7601 

Can you please list all the steps needed

this laptop does not have a dvd drive also the USB ports are 3.0 i guess and the hard disk is a ssd

because of these installation is not successful because some drivers are missing

Can you please list all the steps needed this laptop does not have a dvd drive also the USB ports are 3.0 i guess and the hard disk is a ssd because of these installation is not successful because some drivers are missing

You can try to follow the instructions here:

http://en.community.dell.com/support-forums/software-os/f/3524/t/19999620 

so I download these files and keep them in the folders as suggested in the c:/ Drive of the Laptop on which I am going to install Windows 7

the script is not working for some reason so I will download the files individually and keep them in folders

also it seems there are duplicate files

You need to have them on the C:\ Drive of the computer you are going to run the script on. The script incorporates them into the install.wim and boot.wim (needed for Windows 7 installation).

the iso image i have is Windows Ultimate 64 bit

i have created the Bootable USB using  rufus  (GPT Partition scheme for UEFI)

after that i ran Windows 7* USB 3.0 Creator Utility

Beginning patch process...

Accessing ./sources folder for install.wim & boot.wim

Detecting if 64-bit or 32-bit...

Windows image is 64 bit

Detecting windows image edition...

Edition is Windows Ultimate.

Creating mount directory

Determining number of images

Number of images detected: 4

Mounting install.wim image:1

Adding USB 3.0 Drivers to install.wim image: 1

Unmounting and committing install.wim image: 1

Mounting install.wim image:2

Adding USB 3.0 Drivers to install.wim image: 2

Unmounting and committing install.wim image: 2

Mounting install.wim image:3

Adding USB 3.0 Drivers to install.wim image: 3

Unmounting and committing install.wim image: 3

Mounting install.wim image:4

Adding USB 3.0 Drivers to install.wim image: 4

Unmounting and committing install.wim image: 4

Mounting boot.wim image:1 WinPe

Unmounting and committing boot.wim image:1 WinPe

Mounting boot.wim image:2 Windows Startup

Adding USB 3.0 Drivers to boot.wim image:2 Windows Startup

Unnmounting and committing boot.wim image:2 Windows Startup

Cleaning up mount directory

is the process complete here ? because after this there is no activity

The Intel tool is quite buggy...for this reason I slipstreamed the drivers and updates using the script... The script needs to be ran on a Windows 7 64 bit machine.

https://www.youtube.com/watch?v=UCNd4uJbNpw 

you are most horrible advisor