I am new to Ubuntu. Using 16.04 LTS. Have changed from Windows 7 so I have no idea about command lines etc. Have little knowledge of technicalities of software.
In my partition window it shows
The partition is of 0.0 Kb. I don't know how it came there.
It reads thus
"Error deleting partion
Error deleting partition /dev/sdb3: Command-line `parted --script "/dev/sdb" "rm 3"' exited with non-zero exit status 1: Warning: Partition /dev/sdb3 is being used. Are you sure you want to continue? (udisks-error-quark, 0) "
Then there is no 'Ok' button also so that I can continue?
How to delete this partition?