First of all, have the Windows drive checked using the Windows drive checking tools to repair any inconsistency it may have. Then head the following general advise.
Background
Files on an MS Window partition are stored on a file system that is formatted as ntfs
, the file system of Windows. Ubuntu supports this file system for reading and writing, and also has basic file system repair tools.
When you access a Windows file system in Linux, you need to make sure that the file system is clean. That means that Windows should have fully closed the file system before you access it with another file system.
Windows, with the feature "faststart" enabled, does not fully close the file system, as part of the strategy to boot faster. While that is fine for a file system only used by Windows, it is not if you have another OS that needs to access to the drive.
Practical advice to keep the partition healthy
Ensure that the ntfs volume is properly closed and healthy ("clean") before you use it with Ubuntu.
- Disable the option "Fast start" of Windows, so Windows fully shuts down, closing all file systems whenever you turn it off.
- Effectively Shut down Windows before switching to Ubuntu. No hibernate!
- Have the drive regularly checked using the Windows drive checking tools.
If you head that advice, you will be able to seamlessly access the volume on Ubuntu. On Ubuntu, the same rule applies: fully shut it down before starting Windows.