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By: Robin Watson
The BitLocker Drive Encryption is a feature available with Ultimate and Enterprise editions of Windows Vista and Windows 7. It requires the boot volume , isolated from encryption. And for this, 'Bitlocker Drive Preparation Tool' is available.

Sometime this tool fails and one of the top reasons might be files that it finds immovable from the partitions. In such situations the reinstallation of operating system becomes unavoidable, which may also cause the data loss. So, to tackle the situation , you should have a data backup or a powerful Windows Data Recovery utility that could recover the data.

Sometimes while using BitLocker Drive Preparation Tool for Windows Vista ,there may display the following error message:

“[E_BDECFG_NO_CANDIDATES]
The BitLocker Drive Preparation Tool could not find a target system drive. You may need to manually prepare your drive for BitLocker.”

Lets discuss the reason:

Following are the two possible reasons of this behaviour.

After the active partition size has been reduced to 1.5 GB, it should contain a minimum of 10 percent of free space. So, insufficient free disk space might prevent the tool to operate.



The BitLocker Drive Preparation Tool procedures involve steps like defragmenting and resizing the partitions. But some unmovable files, such as Windows resgistry, NTFS metadata files, page files and hibernation files, can halt the task.





In this world there is no problem without a solution. So, here we are:

To create sufficient free space on disk, you should delete the non-required files or move them to a different partition.



For solving unmovable files issue, you should try disabling disk paging and hibernation and deleting the related files. If you still cannot use the BitLocker Drive Preparation Tool, reinstall Windows Vista and restore data from a suitable backup.





If backup is not available then this is a major problem. To deal with such situations, there are a number of products available that can recover windows partitions. These are third-party tools, which are designed with exclusive technology of Windows Data Recovery.


visit: http://www.windows-data-recovery.net
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