STOP error message generally occurs when Microsoft Windows encounter a problem which can cause the system to shut down to prevent damage. Due to the STOP error message, the system becomes unbootable, which makes the data stored in the hard drive inaccessible. In order to retrieve and restore the lost data , you need to maintain a valid backup file. In case of non-availability of backup file, an effective Windows Data Recovery Software will provide you with complete recovery of your lost, missing or deleted data.

For instance- you may get the below error message when you restart your Windows based system

“Stop: 0×00000072 (parameter1, parameter2, parameter3, parameter4) ASSIGN_DRIVES_LETTERS_FAILED”

After the occurrence of the above error message, the hard drive data becomes inaccessible. Additionally, the above STOP error message will prompt repeatedly , each time you attempt to boot your system.

Reason of this behavior:

There are 2 main causes of the above error message:

Incompatible Device driver.

Drive letter assignment failed.

Lets Solve the Issue :

To resolve the above Stop error message, you need to follow the steps given below:

Remove the additional hardware and reboot the system.

Try increasing the RAM (Random Access Memory) and disk space of the system.

Make sure the hardware and the drivers are compatible with the Windows by using Microsoft Hardware Compatibility List (HCL).

In most cases, you will be able to resolve the issues regarding the STOP :0×00000072” error message . In case the problem persists, then using the Emergency Repair Disk will prove handy. If the repair disk is unavailable, then a clean re-installation of the operating system is recommended. A clean re-installation of the operating system will erase all the data from selected hard disk partition. Thus, before performing a clean re-installation, make sure you have a valid backup for your data.

But, if you do not have a backup file and the data gets lost, then Windows Data Recovery utilities will powerfully extract and restore the lost data from the hard drive.. The Windows Partition Recovery applications are specifically designed to recover lost, deleted or missing data from the hard drive. These Windows Data Recovery applications employ highly enriched graphical user interface, that makes them user friendly.

Stellar Phoenix Windows Data Recovery v4.1 is a phenomenal Windows Data Recovery Software that systematically recovers lost or missing data from the hard drive.The non-destructive tool natively supports Windows 7 RC1, Vista, XP, 2003 and 2000. This software is compatible with FAT32, VFAT, NTFS, and NTFS5 file systems.

Sometimes, it happens that our system hangs while downloading data from internet and most of the computer users are forced to shutdown their system. This may lead to pop-up a STOP error message that makes the data inaccessible. An solution to these data loss situations is by restoring the data by backup. However, if no backup is available or backup is unable to restore the preferred data, then the best option left is to use advanced windows data recovery software that can recover the lost data. Sometimes, in critical cases, there may be a complete system crash while downloading songs from internet . On system restart, you encounter the below error message: “Stop: c0000221 Unknown Hard Error \SystemRoot\System32\ntdll.dll” All the files and folders become inaccessible after the above error message appears. The same error message occurs even after you attempt to boot your system in safe mode. Reason of this error message: The root reason for this error message is the corruption or damage of ntdll.dll file which is one of the critical files located at c:\winnt\system32 and is required for Windows to boot. Corruption in this file primarily occurs due to virus infection. How to solve ?

To troubleshoot and resolve the above STOP error message, you will need to boot your system by using Windows boot CD. In case problem is not solved by it , then the best option is to go for reinstall the Windows. A fresh reinstall of Windows would delete all the data stored on the hard drive . Now for the recovery of data after reinstallation process you will need to use effective windows recovery application. Such products employ high end scanning methods to provide complete recovery of lost data.

Stellar Phoenix Windows Data Recovery Software is a flawless file data recovery utility that is compatible with FAT32, VFAT, NTFS and NTFS5 file systems. The read only tool recovers lost data from corrupted, deleted, formatted or lost hard drive partitions. It is compatible with Windows 7 (Currently in RC1), Vista, XP, 2003 and 2000.