Yep, its the RAM. Im pretty sure now !
I removed the 4gb RAM module that came with this laptop, and replaced with another 4gb RAM taken from another laptop. Ran the same tests again DELL told me to run, and it the results were successful, no error 0123 and no Integrity Test Failure.
So im going to wait for my new RAM that they are going to send !
Thank you very much guys for helping me here and giving me suggestions for programs and such, I really appreciate that
I will reply here just to finalize everything once the new RAM chip is received, and I will run some tests again to confirm it works.
Thank you again