Frooze then blue screen

Hi,
My computer frooze yesterday when I was using Lightroom. When it happened the screen is froozen but stay on and I don't have contact with the keyboard and the mouse anymore. Their light are off.The only option is to shut down the computer with the main power button.
Today, while using Firefox I got a first blue screen (see Blue Screen_1).
1 hours later I got a second blue screen while having Photoshop, Bridge, and Firefox open (see blueScreen_2)

I formatted my hard drive last week-end and just finished to put my software back yesterday.

I already had those errors in the past it's why I decided to format my computer.

Thank you for your help.

This morning I had a third blue screen.
After that I tried to check the memory because I read somewhere that it could help but the computer froze while it was checking. It was written that I have a hard drive problem but I don't know which one.
Please can somebody help me?