First open command window (To open the cmd window first
click on ‘START” and write “CMD” in search box. Click on CMD then you will find
a black color window that is cmd window.) And write there.
DISKPART
DISKPART
LIST DISK
SELECT DISK 1
CLEAN
CREAT PARTITION PRIMARY
SELECT PARTITION 1
ACTIVE
FORMAT FS=NTFS QUICK
ASSIGN
EXIT
Now exit the pen drive and it is now bootable.