I was first using Windows 7 then I tried Ubuntu 13.10. It was good.
Then I wanted to try BOSS (Bharat Operating System Solutions) Linux, but it didn't install.
Till then I had formatted my two disk drives. Then when I wanted to go back to Windows. It started for once, then it didn't start. I used Boot Repair for a whole night, then using Windows install DVD I again installed Windows 7.
I want to install Ubuntu in dual boot again from a USB stick, but it displays this error message:
BOOTMGR is missing Press Alt+Ctrl+Del to restart
It only displays the above message when I have set the USB stick first in the BIOS boot order. The same message also appears for the boot repair disk. Otherwise when I boot from the hard disk, there is no problem with booting Windows 7.
I have already checked the steps I followed when I made the Ubuntu USB stick. I visited the Ubuntu USB stick instructions page and I followed the same steps there, but the same problem persists.