zubi.com :
my pc is neat and clean not even a piece of dust
Just but a new PC? lmao sorry had to
1.Do you have temps? maybe you need to reapply thermal paste? sounds like an overheating problem...if you can't check via software or bios, just open your case and check the heatsink by hand... you will know when it is too hot.
2. Dead Ram, it can be one of your ram is corrupted or dead, unplug both sticks (if it 2x1GB) or one stick (if it is 1x2GB). Try different slots, or check on different system. Doubt ram is the issue but you never know. If you have 2 ram sticks then stick one stick first and boot, see if it helps, if not unplug and repeat.