OK lets get a windows RC console for you
Download the following two programmes to your desktop :
1.
WiNTobootic2.
Windows 7 RCExtract wintoboot to your desktop
Insert a USB drive of at least 4GB
Run Wintoboot
Drag and drop the Windows 7 ISO to the programme in the space indicated
Tick the Format box and accept the warnings
Press Do It
You will see it progressing
It will let you know when it is done
Insert the USB into the sick computer and start the computer. First ensuring that the system is set to boot from USB
Note: If you are not sure how to do that follow the instructions
Here When you reboot you will see this .
Click repair my computer Select your operating system Select Startup repair