If you had problems with USB storage drives
USB storage device cannot be recognized or mounted on a computer that is running Windows 7 or Windows Server 2008 R2
Syntoms
Consider the following scenario:
- You enable BitLocker Drive Encryption on a USB storage device that is connected to a Windows 7-based or a Windows Server 2008 R2-based computer.
- When you run BitLocker To Go on the USB storage device, one of the following situations occurs and leads to an NTFS unexpected shutdown (also known as a dirty shutdown):
- You disconnect the USB device without ejecting it.
- The computer encounters a hard restart or shutdown, or encounters a power failure.
In this scenario, the USB storage device cannot be recognized or mounted on the computer. Additionally, when you run the Manage-bde.exe command on the removable storage device, the following error message is received:
ERROR: An error occurred (code 0x80070020):
The process cannot access the file because it is being used by another process.
Cause
This issue occurs because the virtualized boot block on the storage is created at a random location. Therefore, the virtualized boot block is overwritten by other files incorrectly.
