hi,as per your screen shot it shows that u installed OS in extended partition in place of primary partition..that's why some files installed in primary partition n rest in c drive. try to right click your primary partition n try to assign a drive letter to your partition..hop u will get all your data which is in this partition.and after that back up your data in other partition and reformatted your system and installed OS in primary part ion.the problem will be resolved.
Thanks,it worked.I backed up data.
What do i do next ?
Where should I Install Windows again and what about the already installed Windows?
below is screenshot of latest disk mgmt