the Bsod occur at any time

I am certainly not the resident BSOD expert, but....
The first thing I would recommend would be to update your wireless driver from here
https://www.atheros.cz/atheros-wireless-download.php?chipset=31&system=8
After which, since the Blue Screens seem to be all over the place I would recommend you boot from
http://www.memtest.org/
The zip file containing the ISO is near the bottom of the page, you can create a bootable CD and run it for at least 8 passes and see if it finds any issues with your installed memory.
Finally....
From an elevated command prompt type
chkdsk C: /R
hit enter
answer Y for yes
and reboot
Let it run and see if it finds anything.

 

Ultimately you're going to have to run chkdsk C: /R
sooner or later to determine if you problem is that drive.
Depending on the overall size of the drive and the amount of data it contains it will often take hours, 4 or more is not unusual.
I've left it run overnight before.
You can't always go by the information you are seeing on the screen regarding progress. Sometimes it doesn't update that data in a timely manner, especially if it is doing some particularly large files, like videos.
The hard disk activity light is a much better indicator as to what is going on.