My pc loads windows then the microsoft name and rectangle appear on a black screen. Then it just goes off. No warning, Like you pulled the plug. The same when you try safe mode, it won't load either. Help?

Could be a problem of overheating. Open the case an check the CPU fan and whether the heat sink of the CPU is full of dust.

Check all case vents too. some other bloke...

Everything is clean. I erased the hard drive and that took 3 hrs. with no overheating problems but when I try to reload windows os it shuts off. I turn it on and load from cd, then it says windows loading files, after the files are loaded it shuts off like someone pulled the plug. I also tried safe mode and same thing.

Try to search for a special patch on the manufacturers homepage.