Procedure entry point?

Hello, I am having a "Entry Point Not Found The procedure entry point “dmAPP_isUnlockedVIDPID” could not be located in the dynamic link library dmBackup.dll problem. When I try to open files on my SanDisk USB 8GB flash drive. This started the last time I exited the disk and believe I didn’t right-click hardware device and click eject. No when I plug it in, I get the msg

Try cancelling SecureAccess then open a Command Prompt and running a chkdsk on the drive.