I tried to use my PC for the last three days but these are things keep happening on my PC that unable me to use it:

1. The lights and fans in the CPU turns on and off, and there's no display in the monitor.
2. The lights and fans in the CPU are on but still no display in the monitor.
3. I was able to use it for a brief time but the display in the monitor or the PC freezes and need to restart it.
4. I was able to use it but it crashes and blue screen appears.
5. I was able to use it but a blue screen appears that show bad pooler call error.
6. I was able to use it, crashed, blue screen appears that needs to be restarted
7. The monitor stuck at displaying the brand of my motherboard.
8. The PC keeps crashing or restarting.

By the way, I'm not that knowledgeable with computers and try to troubleshoot with the help of google searching, and also I tried to list or explain what happens with my pc.

Please help me with this one. I don't have enough money to let it check up on professional guys who fix PC and also I kind of not trusting some of them since some of them steal parts and replace them with much lower qualities, as I heard.

Thank you in advance.