If you are trying to open a file on a storage device after your computer resumes from Hibernate, it is probably corrupt. This happens when a storage device was removed from your computer after it has entered Hibernate, attached to another computer, and is then plugged back into your Hibernated computer and resumed.
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in the notification area, at the far right of the taskbar. You can use this as an indication that your devices have finished all operations in progress and are ready to be removed. If you don't see the Safely Remove Hardware icon, click the 
, and then, in the list of devices, click the device that you want to remove. Windows will display a notification telling you it's safe to remove the device.
, click