PC not starting after motherboard drivers installation

Hello all. I am new here. My name is Alexander and i am a 32 years old man.
I installed yesterday windows XP SP2 on my mother PC, a MedionPC with a CPU Intel 2.4Ghz and 2 GB DDR RAM, and after finished install, i faced a problem. After install, i started installation of motherboard drivers, all good, till first restart. It wont restart, it's starts to load Windows logo, but dont finish, it gets a short and too short blue screen message (impossible to read the error message), and then restarts, and the loop continues. What looks very curious is i was able to access safe mode, and even access windows, if i shutdown the PC from power button and start it that way. Any ideea what is damaged, and how can i fix this issue ?