Boot up error and partition errors on using the recover partition software

What are required when using a recover partition software? It seems like after a quick scan and scanning for lost partition on Windows sometimes it does not scan those that of a different partition. Do i need to thoroughly scan? Apart from what when sometimes the boot disk bootable media does not boot at all after selecting the correct boot priority. It sits there blank. Is there sometimes I can do about it? Or probably there were errors on the whole recovery process.
