Try the whole process again. When you are finished installing 10.6.3, create a new profile...see the quoted post below. Run Disk Utility to repair permissions once you have created a new profile. Best of luck!
The processor is a Intel ® Pentium ® D Dual Core 2.80GHz. The installation went smoothly and it runs like a dream. It is very fast and has not had any issues.
I also installed on a GX620 with a 3.60GHz Pentium 4. That installation didn't go quite as smoothly. I had to use Nawcom's boot CD instead if #####. And when I had finished the initial installation and was doing the registration/set up process,there were problems. I was able to create a user account, but it froze up and I had to restart before the process was finished. Then it ran slowly, applications froze up often, it just wasn't running well. I was able to fix it by going to the system preferences/accounts and creating a new profile. I made the new account the admin and deleated the original account. It is running fantastically now.