If volume looks OK for the disk you are recovering (you see all volumes in the Explorer Tree), but Windows still does not recognize a volume, or says "Volume is inaccessible" , it is possible that Partition Boot Sector (or Copy of Boot Sector) is damaged by virus or overwritten. You can try to use Fix Boot Sector command to replace Primary Boot Sector with its Copy (or backward), or both of them from the set of templates (typical boot sector). The idea is the same as for the Manual Volume Recovery Mode.
You can delete the only existing partition (Primary or Extended) and you cannot delete the System partition (Active one or having Windows installed). If you need to delete the Extended partition, make sure that it is empty (no logical drives left in it). If logical drives exist in Extended partition, you are to delete them first, then to delete Extended partition itself.
Fix Boot Sector command for the hardware device has been automatically logged to the partitioning backup file, and you can always rollback you changes later on.
Fix Boot Sector function is available in commercial (purchased) version only.