Laptop not working. Showing black screen

[Jyotsana]

I have dell vostro 2420 come pre installed with windows 8.
I have updated it to windows 10.
But by mistake I have delete all the partition including system partition also.
Now laptop is not working and showing black screen.
What to do....plz help

 

[rgd1101]

download windows 10 on microsoft site and do a install. https/www.microsoft.com/en-us/software-download/windows10