Disable Hybrid Sleep Mode in Windows
From Free Knowledge Base- The DUCK Project: information for everyone
Since Windows Vista Microsoft has introduced a new on-by-default feature called Hybrid Sleep. This feature tends to be problematic and is related to Windows going to a blank screen and locking, or not shutting down properly. It can also cause the harddrive to show the windows partition is a locked state which makes certain types of recovery difficult.
Recommendation: Disable Hybrid Sleep in versions of Windows including Vista, 7, 8, 8.1 and 10.