Windows 10: My windows10 is missing the boot device I been trying to do a repairs on command prompt and...

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Installation media boots to command prompt

I've just booted from known working install media to see exactly what it does when booting. The sequence of events is...

1. Windows logo on a black screen
2. circling dots appear beneath the logo
3. light blue 'Please wait' screen with circling dots
4. a command prompt window (very briefly)
5. the initial Setup page appears

Do you see steps 1-3? If so, it appears you have stopped at step 4, suggesting that something on the disc cannot be read.

Does the disc boot properly in another machine? If so, try cleaning the laptop's drive lens then try booting from the disc again.

If not, make new install media with Microsoft's Media Creation Tool, either as a bootable USB, on an ISO that you can burn to another disc. At Step 8 in Option One of this tutorial you can choose between making a USB or an ISO.

Download Windows 10 ISO File

 

command prompt will not open in safe mode with command prompt

I am repairing a laptop for a friend and I need to access windows in safe mode and the owner has forgotten the password to the main user. I tried logging on with the administrator profile in safe mode but it is not showing up so I was going to use command prompt in safe mode with command prompt but command prompt will not open when I boot that option. Does anyone have any hints for me to figure this out?

 

Startup repair not working after "Default boot device missing" message

Hi Adam,

Corrupted boot system files is one possible cause why you're getting an error message after running the startup repair. Before we proceed, I'd like to know if you have made any changes prior to the issue.

Meanwhile, I would suggest that you boot from Windows 10 installation media in a removable storage device, flash drive, or DVD and access the Advanced option. To do this, follow the steps:

• Insert the USB or flash drive to your PC and restart.
• The Windows Setup screen will pop-up, select language and click Next.
• Choose Repair your computer.
• Select Troubleshoot.
• Click on Advanced options.
• Choose Command Prompt and enter the following commands:

bootrec /scanos

bootrec /fixMBR

bootrec /fixBoot

bootrec /rebuildBCD

• Restart PC and check if there are any changes.

Update us with the results.