If your computer runs Windows 8 or 10. You can download the ISO from Microsoft and burn it to DVD or install it on a Flash Drive. Then you can try repair options or perform a clean install of Windows. This has the added benefit of a vanilla Windows install without all the Dell bloatware. https/www.microsoft.com/en-us/software-download/windows8
https/www.microsoft.com/en-us/software-download/windows10
If your computer runs Windows 8 or 10. You can download the ISO from Microsoft and burn it to DVD or install it on a Flash Drive. Then you can try repair options or perform a clean install of Windows. This has the added benefit of a vanilla Windows install without all the Dell bloatware. https/www.microsoft.com/en-us/software-download/windows8
https/www.microsoft.com/en-us/software-download/windows10