BSOD pc restart few times before start, sometimes won't start

If your power supply is more than three years old, I'd swap in a known-good unit to test.

You are running a Dell oem_slp Product ID (PID) on a BIOSTAR board which is using a BIOS from 2008, this cannot be done without a crack.
This makes your installation counterfeit.
Troubleshooting a counterfeit installation is useless as it is not known what has been modified to your system.
A counterfeit installation contains heavily modified code which causes the system to behave in unexpected ways.
For this reason, analyzing counterfeit systems is unreliable and most analysts won't try it.

Code:

OS Configuration:          Standalone Workstation
OS Build Type:             Multiprocessor Free
Registered Owner:          Cvetkovic
Registered Organization:   
Product ID:                00426-OEM-8992662-00400 <-- Dell PID on Biostar board
Original Install Date:     9.5.2016, 6:23:06
System Boot Time:          11.5.2016, 11:40:56
System Manufacturer:       BIOSTAR Group

BIOS Version:              American Megatrends Inc. 080014 , 11.11.2008

I recommend to install a genuine copy of Windows.
If, after you have installed a genuine copy of Windows, you still get BSOD's we'll be happy to assist you.