I have just downloaded Win7 Sp1 x64Bits (Media Refresh) frm here. Now, i can check Hash frm .ISO but cannot check after i burned it to a DVD, So i would like to ask if Hash check can only be done on ISO only and not on burned media? I had checked the Hash frm MSDN, but it doesnt show MD5 of the file, only SHA1... So where to look for official MD5. PS: I am kind of newbie on this, so excuse my ignorance.