win2000 log in problem help

I have a bad problem.

I added some RAM. So i took out the component to make room to work. When
all said and done. I booted up and it looked normal.

When I log in, it loads and then it shows "loads personal settings" and then
"saving settings". Then it shows the log in box again.

I log in again, it does it again. I tried turning it off and boot back up
over and over but it just does the same.

It won't continue pass the "loading personal settings and saving settings"
I tried to boot to safe mood, but it won't let me log pass the same thing
either.

Help me. What is wrong?
Is there something I can do in DOS or with the WIN2K CD without losing my
info and settings?


I uninstall the RAM but it all turns out the same thing.

OS: Window 2000 SP3 312MB RAM