Look, @softwaremaniac, you helped me a lot.
After I deleted AVG, there were no crashes, but lately I had few more.
Crashes details from WhoCrashed program:
On Tue 11/11/2014 10:20:55 PM GMT your computer crashedcrash dump file: C:\Windows\Minidump\111214-6031-01.dmp
This was probably caused by...