Try this following steps:

1. Try to turn on the computer and when u get to the DELL screen pres CTRL-F11.

2. Try booting off the disc and try chkdsk /r in the recovery console

3. Worst case scenario is to reformat the hdd and do a clean installation of the OS, but you will be needing discs for this.

Well Dear, Dell PC Restore by Symantec is available on Dimension and Inspiron systems that have shipped on or after 7/15/2004. DELL PC Restore,will work if you hit Ctrl and F11 on DELL screen when Windows load..

If that did not work then , Windows disk is required to make repair , or re-install Windows adn also Drivers and software disk to load them ,

Need not worry if you do not have the disk , just contact DELL chat support if the system is not too Old , they will provide you all the disk for the system. and that will make the issue resolve ,

In order to make the disk BOOT and Repair or re-instal Windows I will provide the link  , If you have disk , Please let me know

But make sure , you need to provide the information regarding the Own of the system , Then only DELL will send the disk.

My Inspiron 6000 magically had same problem. One day it works, next day Loading PBR 2 Done then nothing. I did not want to lose all of my files by using ctrl-F11. Dell support was no help. I bought a 2.5" usb disk chassis (cost $25 at Best Buy), removed Inspiron drive from laptop, installed it in chassis, and hooked drive up to another computer. To get access to files I had to log into administrator account and change ownership (Microsoft explains how to do this) and protections for My Documents folder for each user. I copied files to back-up computer.

Here is the big suprise. When I removed drive from USB chassis and plugged it back into my Inspiron, preparing to do the CTRL-F11 mind wipe, the computer magically booted. I have no idea what happened. I am totally clueless as to why changing user protectections and ownership of My Documents made a difference. Computer works just fine now. No further problems. No lost files.