Diskpart.exe to clear volume attribute

[Firon]

I have installed Vista on my pc, the problem is when i try to do anything with my hard disk Vista shows the message "The media is write protected".How is that possible to give write protection permission to the internal disk. Is that any way to remove that permission?

[Rawko]

A hardware problem or an OEM third-party filter driver can interfere with the volume shadow snapshot process. In this case, the read-only, hidden, and Nodefaultdriveletter volume attribute bits may remain set on the original volume.

[RoninBlade]

Do you get any errors during boot up ? What you do before the message appears on the screen? have you tried to another hard disk th the same system. The error "Media is write protected" is occur when the hard disk you are using is write protected.

[Hamir]

For master boot record (MBR) basic disks, the attribute bits are applied or changed disk-wide and affect all volumes on the disk. For GUID partition table (GPT) basic disks, the attribute bits are applied or changed per volume. For dynamic GPT or MBR disks, the attribute bits are applied or changed per volume. The Logical Disk Manager (LDM) service checks the volume that is selected in the Diskpart.exe utility to see if the volume is a boot, system, page, crash dump, or hibernate volume. The LDM service does not set the attribute bits if the selected volume is one of those types, and the Diskpart.exe utility displays an error message.

Check this guide for more information :
How to use Diskpart.exe to extend a data volume in Windows