Windows doesn't start, keyboard doesn't work

Hello, I was hoping you guys could help me. I have a Dell Inspiron 1525 running Vista. This past Friday, I turned it off so it could download 2 windows updates. Once I turned it back on though, I get to the Dell screen, but right after it I hear 1 short beep, followed by 2 long beeps, then 3 sets of 2 short beeps. Windows doesn't turn on and it gives me a screen that looks like the Advanced options screen, but the keyboard doesn't work when I press the keys. I turned it off and tried to press F2 or F12 during the Dell loading screen but it won't work either. If you guys need any more info I'll gladly give it and if you guys can help me out or suggest something I'd really appreciate it.

Thanks, Marcos