I previously had Windows Phone 8.1 and tries to install Windows Phone 10 and while its installing (showing the Settings animation) I plugged the phone to a Windows 7 PC and it tried to Install a driver called "Nokia BOOTMGR" and I cancelled it. After that, the behavior is 1) Showing Nokia logo 2) Showing Settings animation 3) Restarting automatically 4) Go to step 1 and loop through above steps

so I am unable to boot the phone. How to resolve this? I tried soft-resetting it does not help me.