Microsoft's latest operating system, Windows 7, has everything that a computer user can ask for. The users using systems based on Windows Vista operating system can also upgrade their systems to Windows 7 and enjoy all its advanced features. Migrating to Windows 7 can be easily performed by using a Windows 7 upgrade software. Moreover, the process does not require you to perform backup of your hard drive data. Migration to Windows 7 might be an task, but it can also leave your system in an unbootable state, if not performed systematically. In such situations, the data stored on your hard drive becomes inaccessible. To retrieve data, an up-to-date backup enables you to restore the data. But, if the backup is not maintained or inaccessible, then you will need to use advanced data recovery softwareto recover your data.

Consider a practical situation, where you start migrating from Windows Vista to Windows 7 operating system. However, after the first part of installation was over, the system was unable to boot the setup configuration. Left with no option, you go back to Windows Vista by deleting the setup information and cleaning the boot record. After doing so, when you attempt to reboot your system, you receive another booting error message:

“A Disk Read Error Occurred. Press Cltr-Alt-Del to reboot.”

Once the above booting error message is displayed, the data stored on the hard drive becomes inaccessible. This error message pops up only when the migration process is not followed systematically.

Resolution:

To resolve the above booting error message and access the hard drive data, you will need to follow any of the below steps:

Enter Windows Vista setup CD.

Open the Recovery Console.

Run CHKDSK command.

However, if the above steps fail to resolve your problem then you will need to reinstall Windows Vista. This resolution ensures that the system will be bootable and you can store new data on your hard drive. However, the resolution has a major disadvantage that your previously stored data will be deleted from your hard drive. To overcome this disadvantage, you can use an effective data recovery software to recover the formatted data. A data recovery tools incorporated high end scanning procedures to salvage the formatted hard drive data.