Hi Ray
think you will know the answer to this one - as a professional Rgistry hacker:-

deleted System Volume Information from one of my data drives: it went to the Recycle Bin. but nothing I do will get it out of there - 663 Mb just sitting there !

Neither can I restore it to its oroginal location as access is denied. I have altered the permissions to give me full control, but still can't shift it.

FYO System Restore is turned off - this file is the legacy of a new install, before turning SR off.

Any suggestions gratefully received

   The contents of the Recycle Bin are kept in a hidden folder called recycler or recycled (depending on the Windows version) of the drive that the file was originally on.  You might try going there, seeing if you can figure out which file it is, and try to delete it there.

Thanks Ray

already been there: done that - didn't work.

HOWEVER running A1Click did the job ! Don't know why I didn't think of that before