Sandisk cruzer 16GB became read-only

Scandisk has software on the Flash Drive that changes it to a Read Only if the Drive senses something is wrong with the Operating System. I received a replacement Scandisk Cruz 32 GB from Scandisk. The first thing I did was reformat the Thumb Drive to NTFS so I can save files larger than 4 GB as 1 file and delete the Scandisk software that can create the Read Only.