Well you can get smart, or you can honestly seek help.
Of course I am saying that, because you have not told us enough. We cannot read you mind, or the computer We cannot see the machine, or how much you know. So with that comes the expectation questions or what others at home have said to you. You sent the message here after you had other input. But what computer or motherboard, and other devices do you have? What programs are you running. Usually media software causes this, if it is not a hardware error.
We narrowed ti down to the five most likely. No you tell us what it could not be.
You have the message that is repeated three times:
"Error Processing Message C0000012" That is often a memory error
"Parameter 75b6bf9c 75b6bf9c 75b6bf9c" but caused by something else... not a failure of memory itself.
Note that the parameter is repeated three times, again a hardware errror.
But the question is "Why?
Did you install a new DVD burner? A common failure that causes this error. Other hardware installs can also cause what you report.
Did you install a new hard drive, memory module, or other device?
The Exception Processing Message c0000013 Parameters 75b6bf9c 4 75b6bf9c 75b6bf9c is also a common problem on some HP and MANY emachines... related to hardware and motherboards.
If you have an eMachine, your computer motherboard is going bad.
To get rid of the message, go to Start-> Run-> msconfig-> Startup
Shut down iTunes, Adobe Reader, Quicktime, RealOne Message Center, Qttask, and other such helpful devicesm), and qttask.
Your message will likely go away unless you have a hardware problem
Turn off junk software you don't need running but leave your system and accessories programs running.
Good luck in finding help that suits you.
