How to delete entire hard disk include os

[Prasadchowdary]

Hi 

iam using HP G6 pavilion unexpectedly install dule boot but after instal Ubuntu it’s not going back to windows 10 I’m tried to repare it’s not opening help me.

[WAWood]

@Prasadchowdary 

When you install a Linux distro in dual-boot mode, you modify the drive boot record so that it reads the first Linux partition, instead of the first Windows partition, by default.  If you just then uninstall the Linux distro, you did not change the default boot -- so it will still try to boot Linux.  You should have restored the Windows boot BEFORE removing the Linux distro.

If you have access to another Windows PC, you can create USB media on that PC that you can use to repair YOUR PC so it boots into Windows again.

1) Download and install Macrium Reflect (MR) from this link on a working PC: http://www.macrium.com/reflectfree.aspx
2) Use the option to create a boot USB stick or CD

That will create MR bootable media. Then, you can boot your PC into WinPE using that media.

Have patience, as that can take a while to start and bring up the screen.

Once the screen is there, select the option to Fix Windows boot problems. It will then search for the OSs installed and list them, Select the one you want to repair and click Next.

It will now do the repairs, listing the things it has done.

When finished, select the option to Restart the PC.

If this worked, the boot repair succeeded and you will have your PC back.