Microsoft Windows XP is a highly reliant operating system that is widely used in homes and small and large  businesses. When Windows XP starts, it checks a large number of files for integrity. These files include, DLL files (dynamic-link libraries) and driver files. The various DLL files include Ntdll, Kernel, Shell, User, Graphics Device Interface (GDI), Crtdll, and many more. And if you install an inappropriate device driver, or one of your DLL files is missing or corrupt, then Windows XP halts, while giving an error message. This leaves you with no option but to opt for Partition Recovery methods to get your files and data back.

These atrocious messages may be one of the following, and generally accompany a blue screen (BSOD),

STOP: 0xC0000221 STATUS_IMAGE_CHECKSUM_MISMATCH
Path\File_name

Or,

STOP: C0000221 unknown hard error
Path\File_name

Or,

STOP: 0xC0000221 unknown hard error
C:\Winnt\System32\Ntdll.dll (or another specific file or driver)

Irrespective of which of the above stated error message flashes on your screen,  you either have a problem with the hardware (in which case all connections will have to be checked), or network (which calls for checking of the cabling of the hard drive), or maybe the specified file is corrupt (and will have to be replaced by a good copy of it). If all else fails, then the only thing that can save the day is a clean reinstall of Windows XP. But reinstallation of the operating system, would mean that you will lose all the data saved on your partition. But, with the help of backups, it is possible to recover Windows partition.

However, if a user doesn’t have a backup, then it is a difficult situation, as it makes partition recovery an impossible task. To aid users in such situations, a number of reliable partition recovery tools are available on the internet. These software apply complex recovery algorithms to recover data from every sector of the hard drive. Designed to have simple graphical user interface, and with detailed documentation, these tools can help a user to recoup all the data that has been lost, irrespective of the reason of its loss.

Stellar Phoenix Windows Data Recovery is a comprehensive software that can recover Windows partition data irrespective of whether they have been formatted with FAT16, FAT32, VFAT, exFAT, NTFS or NTFS5 file system. Compatible with Windows 7, Vista, XP, 2003 and 2000, this software supports recovery of more than 185 different file types. With read-only conduct, and various recovery options, including, file recovery, disk cloning, RAW file recovery, disk imaging, apart from partition recovery, this tool is highly efficient.