If you create software, that needs direct access to the files or partitions of your disks (including hard drives and flash disks), you have probably faced the restrictions, imposed by Windows XP and Windows Vista operating systems.
Windows XP prevents your from using raw access to disks if the application is run under restricted (non-administrative) account. Windows Vista doesn't allow you to access the disks from user-mode processes at all.
Both systems won't let you open the file, if it's exclusively opened by another application or if security settings (permissions) don't let you access the file.
RawDisk effectively solves this problem by providing a kernel-mode driver for use with your applications.
Using this driver you can read and write the data from/to the disk or opened files without any restrictions.
All you need to do is add two extra function calls to your application.