Disable FastBoot Win8

Step 1: Open the Windows Registry editor
Step 2:open key HKEY_LOCAL_MACHINE \ SYSTEM \ ControlSet001 \ Control \ Session Manager \ Power
Step 3: Locate the key HiberbootEnabled and double-click on it
Step 4: Set the value of the key to 0 to deactivate fast boot
Step 5: To restore the setting at a later time, change it back to 1.
Step 6: next open key HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Control \ Session Manager \ Power
Step 7: Locate HiberbootEnabled there and double-click the entry and Change the value of the key to 0 to deactivate Fast Boot.

To disable hybrid shutdown (S4) in Windows 8 (not recommended), use these steps: 1.Open the Power Options in Control Panel
2.Select “Choose what the power buttons do”
3.Uncheck “Turn on fast startup (recommended)"
4.Select "Save Settings"