I am trying to fix a computer....It is a HP Pavilion a305w. It did not come with a reinstall disc, instead all the data is on a hidden hard drive partition. This thing needs dumped and a clean install done in a bad way. My questions are: If i reformat the hard drive will it wipe out that hidden partition? If so how can I avoid this. and, If it dosen't How do I access that partition to reinstall windows? The computer is out of warranty so HP Tech support is no help without paying them. Thanks to any and all that can help.