Hi, I have a missing drive in windows 7. It is a primary drive (as shown in Disk Management). The drive shows in Disk MAnagement, but only as a space of memory, without any letters. When I try to assign a letter to the drive, the console wont allow me. I get a message saying that Disk MAnagement console is not uo-to-date. Have to say that this partition shows as primary, its in the only hard disk of my laptop, together with the C partition. All this happened suddenly, after I installed Norton PArtition Manager, because I wanted to increase the size of C partition. But I didnt do any operations, the HSM Data partition disappeared. I tried system restore, system repair, EASEUS PArtition Master to assign a letter to the drive (this program shows my drive), but it wont work in trial mode. Please can anyone help? I am dealing with this for about 3 hours but couldn't do anything?