clonezilla unknown partition table format error

 I had this error while i was trying to clone an old hdd. None of the solutions found on the net worked.
  The solution that worked was to repair entirely the boot sector of the disk using an windows install dvd and entering the command line.
  I used the following commands:

 bootrec /fixmbr

 bootsect /nt60 sys /force /mbr

 bcdboot c:\windows

 diskpart
 select disk 0
 list partition
 select partition x
 active
 exit

 (where partition x is the partition with windows os installed)
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edit: if that's not working for you, then you need to verify/modify the partition table, something wrong is there.

 you can download/read a pdf file from HERE  and you will find how to safe verify/modify a partition table.