Purchase/borrow and use an external CD/DVD drive.
or
Download the install disc from Microsoft to a USB drive and connect it to the laptop. When the System repair asks for the Windows Install, tell it to look on the USB.
Thank you so much for the replay. Its Windows 7 so if I save the archives of the Windows Installation disc in a USB it'll work?
Well, being Win 7, a Win 10 install won't work.
You'd need a Win 7 USB.
You could download the Win 7 ISO from Microsoft, but that requires you to enter a non-OEM license key. WHich I'm guessing you don't have, due to this being a laptop.