خوب دوستان بالاخره ردیف شد البته بوت سریعش (ویندوز 8 ) رو هم تونستم توو فروم های خارجی پیدا کنم اینم آموزشش
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.
Click on Save changes. Now, shutdown Windows 8 and boot back into Ubuntu. You'll be able to mount without getting errors.