I have a HP Pavilion dv6 laptop, with a HD of 500 GB. It has 4 partitions by default. I shrunk the windows partition by 50GB, and deleted the system recover partition. The problem is that I have unallocated 50GB, but they don't appear in windows disc manager, or in minitools partition wizard, etc. They only detect a HD of 450GB. How I can recover those 50GB?