Windows 7 - Unable to run chkdsk hard drive write protected

Please help Unable to run windows on any mode normal or safe when running in prompt mode and ask it to run chkdsk it gives me the following the type of file is NTFS, Cannot lock current drive, Windows cannot run disk checking on this volume because it is write protected. Have tried hard drive on another machine same happens Have put a new Windows 7 on a another hard drive and when I try to run chkdsk on this hard drive Iget the same message as anyone had the same problem please note the hard drives are different makes and the machines have different motherboards ect have also dtied diskpart without any success at present time looking in different forume this seems a problem to a lot of trouble
thenks regards Ric

Does diskpart detail disk tell yo it is read only?

diskpart
select disk X (X=0,1,2 etc)
attrib disk
attrib disk clear readonly

--------------
diskpart
list vol
sel vol X (X is 0,1,2,3 etc)
attrib vol
attrib vol clear readonly

Already tried did not work anyway will keep pluging away thanks very regards richard

post output of "attrib disk" and "attrib vol" please

Cannot lock current drive, Windows cannot run disk checking on this volume because it is write protected.
=>strange message!! Is it the drive or volume that has the problem?

Are there more volumes (partitions) on that disk? if so try chkdsk on that volume as well. Fails too?