I booted my computer with Partition Magic boot disk. It suggested a repair and I did and installed a fresh Windows 7
Now windows does not show one of my partitions in My Computer
I installed R-Studio and these logs appears :
ST9640320AS0002SDM1: Partition table at 840660992 sector and Partition at 409600000 sector overlap
ST9640320AS0002SDM1: Partition at 840661000 sector and Partition at 409600000 sector overlap