Please note that you're running the Technical Preview version, the problem of the crashes may very well be due to a bug in the TP version although that may be difficult to say for sure.

Is Speedfan updated & the drivers from Logitech as @lifetec asked? If it is please remove Speedfan to remove the outdated drivers.
Please download the audio drivers of Realtek from MSI
Support For Z97M GAMING | MSI Global | Motherboard - The world leader in motherboard design 64

Please remove / disable items from the startup in taskmanager
These programs could interfere with the boot process giving you trouble and increase the boot time.

warning   Warning
Programs that claim to update your drivers install either the wrong or corrupted drivers.
If you have installed any driver with Driver Booster 3, please remove them as it may cause trouble.

An easy way to get rid of the installed drivers is using a restore point prior the use of this program.