Randomly crashes after booting,custom build,

good morning everybody !

I am desperate, but hopeful

I have got a custom build PC back from the repair service.
They couldn't fix my HD , so they just saved it, with an E label and they used another HD, just to restart the machine, naming C.

1. I have downloaded Avast free antivirus
2. I have downloaded Firefox.

3. I have downloaded (using an USB device with another notebook)) a driver from Realtek site, bcs Audio was missing at all !

I didn't use the PC further. did not surf the IT.
BCS at almost every restart, I got blue screen with several errors messages.
Sometimes, like now, I can keep it alive , while I am writing to you, but more often, it crashes, after the screen with W logo appears.

I am NOT an espert bu I can follow instructions, very diligently.
Please help me ,
The service shop has closed and are on holidays .

Thanks for your attention anyway

Hi LOST in W7,

your comp looks like its had problems since it was originally installed, 2011.

I suspect the install media was corrupt, possibly due to it being non Microsoft.

You state its a custom build but the product key in use is for a HP OEM factory built computer.
This can only be achieved using an activation exploit, your system is therefor non-genuine.

As this forum does not support piracy, you will need to purchase a genuine product
Until you do so no further help can be provided.
If the problems continue afterwards then we will gladly help you.

Roy

thanks for answering me promptly.

at this point I am quite disappointed so
let me understand, please:

In order to get everything all right and legal, what should I do ?

I mean , literally.

What should I buy ? New software or a new computer ?


What I know from my friend is that they assembled different pieces from 2 different computers , and that's what I got.

I am not an expert, again.

sorry for disturbing further and I will follow your advice.

Thanks a lot