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1. Open Control Panel in the small icons view and click on Power Options.
2. Click on Choose what the power buttons do.
3. Click on Change settings that are currently unavailable.
4. Uncheck Turn on fast startup (recommended).
_{Click on the numbers above to see screenshots.}

1. Open Control Panel in the small icons view and click on Power Options. (see screenshot 1)
2. Click on Choose what the power buttons do. (see screenshot 2)
3. Click on Change settings that are currently unavailable. (see screenshot 3)
4. Uncheck Turn on fast startup (recommended). (see screenshot 4)

##Solution (only for Windows 8):

##Solution (only for Windows 8 and 10):

Click on Save changes. Now, shutdown Windows 8 and boot back into Ubuntu. You'll be able to mount without getting errors.

Click on Save changes. Now, shutdown Windows 8 and boot back into Ubuntu.

If you still aren't able to mount without getting errors, you may need to turn off hibernation completely. Open an elevated Command Prompt (right click on the shortcut, click on “Run as Administrator”), and input:

powercfg /h off