Need help with pc

Hey guys so im having a problem.

My pc didn't worked for 3 months because of blue screen of death i needed to delete partitions and you cant do that with windows xp with that error (0x0000c1f5)

I opened my pc too tried another disks but the pc had another problem. When i turn it on. It shows no image at all. But he's on.
So i changed my graphic card for another one i had here. And it happened again.

So i went back to the old one (That came with pc). Nothing

But 5 days ago i turned the pc on and it worked. I deleted all the partitions and installed windows 7 and the pc was working now. but only sometimes.

For example. Yesterday i played 2hours and it turned off by himself. And i clicked to turn it back on and i didnt show any image. Today it worked again.

For 1 weeks he only works when he wants too.

Why's that?

PS:Sorry if some words are wrong but im portuguese and only 18.

Peace

 

I'm guessing there was a problem with your OS, or maybe it was your power supply. Try checking your power settings.

 

Thank you for your advice i think its good now because it doesnt turned off yet for 6 hours.

I went to power settings and it was on the first option so i created a new one with high power or something like that

thank you

 

Yes, the power plan you picked was probably 'high performance'. If it works better now then that's great. Although you should always keep back ups of files you wouldn't want to lose.