How remove disk write protected

What kind of disk?

Check the bios for a write protect setting.

Do you mean floppy disks?

They have a switch on the side. One position prevents writing, the other allows it.

Not sure what else you could mean.

my pen driver, while downloading a web page I remove it without safety then it became write protect setting.
Plz help me  

It sounds like its become corrupted. Reformat it and start fresh imo.

cant format