yesterday after installed the farstone restoreit,the process as below, it checked the available space in my first drive(c: & F,then display available space for the hidden protected partition for restoreit .therefore I selected F: drive and allocated 3333mb for the hidden partition usage.(actually my drive .F: is 43 gb but only have 1gb space available!)but I enter 3333mb that equal to 3gb isn't it,anyway ,the installation process just not checked it and just allowed me to allocate 3333mb that is out of the expected free space capacity,then it asked me are you sure to creat that hidden partition,I enter yes,at that time I am not knowledged that my F: drive actually only had 1gb left space avalable. after reboot ,restoreit success installation ,create a new restore point at boot automatically.but I open window explorer ,because I am afraid something wrong,double check that the whole drive F: have disappeared ,in the window explorer only have c: and skip to d:,all my valuable information in the F: now dissapear,therefore anxiously I uninstall restoreit in hope that it will recover my F:,uninstalled and after rebooted farstonerestoreit tell me it cannot retrieve the hidden partition (created in F: drive) anymore,could you agree to left it to free space, I not know what to do and enter yes,then after restart window,I still cannnot access my missing F: . I use acronis partition suite to search for lost partition in this hard disk,but find nothing,and is trying active parition recovery ,but it only showed an unallocated partition,after surface tested the lost files and structure still not shown . now my last resort is ,Can I just use the diskmgmt.msc command,and go to the unallocated drive,it is black in color, right click it and create new partition,then "not format it ",can this trick help the hidden and missing partition reappear with all the data in it not destroyed?(I found an article tuturial on that),but not sure is it will destroy all my data?Or should I first use recovery software to save them first,what method can do to save my data,since the drive have 44.8 gb of data,I think it is impossible to recover and save them to other disk,as I do not have this large disk space either.therefore I want is there method to make hidden partition become visible again,without losing data ?can the last known good configuration help,but this drive is not system drive ,it is extended partition's logical part of the primary boot partition. Thanks in advance!