NEED HELP : Error DPC_watchdog_violation and Sensor Device problem

hi guys...

I really need helps for my laptop problem :

1. My laptop starts into "blue screen" with text : your computer ran into problem....DPC_watchdog_violation... what should I do guys?

2. In my laptop control panel action center :

"Your sensor device has stopped working properly because a compatible driver isn't available for this version of Windows.

The model name of your sensor device is STMicroelectronics 3-Axis Accelerometer. This device is distributed by many different PC manufacturers."

is the number 1 problem linked with number two? I read some article and update its driver from dell support web, but it's still restart unexpectedly and "blue screen" in the number one problem appear again.

windows : 8

laptop : Alienware 14

regards,

addhi