Please do the step 7 of the tutorial linked to upload your full specs automatically. You are too clueless about computers to provide decent info for us to answer your question.
Anyway, if "hp media center pc m7067c" is really the PC you have, then this
is its page in Hp site. Navigating from that we reach the motherboard
specifications, where we can read
Supports processor up to 3.4 GHz
Supports Intel Pentium 4 HT processors
800 MHz front-side bus This page
from intel's site (processor manufacturer) lists the processors that fit.
They are all single-core processors. They have Hyperthreading so they appear as dual cores to the programs, and perform marginally better than single-cores without hyperthreading. They all suck
and being so old they are even hard to find
. I advise to buy a new PC
Althugh if you just use it as media center PC
(as it was intended to be used) it isn't so bad.
According to what i know i have a socket cpu and my current cpu is intel pentuim 4 :P the oldies.
So i can get a intel core 3 and have no problems ?
As processors become more powerful, sockets get bigger. Also, the motherboard's chipset must recognize the CPU for it to work properly. See above for what you can install.