Hello, sometimes this does tend to happen You can either do the Recovery Process again and make sure you boot from the recovery disc, or you can get a copy from anyone that has a Windows XP Disc or a Dell WIndows XP Disc and follow these instructions to fix this...
Please do this to fix it...
1) Turn on the computer
2) Start tapping/pressing F12 to get Boot Menu Options
3) Insert Windows Disc
4) Select DVD/CD-ROM drives and press enter
5) Press any key to start the installation
Windows XP users
1) Insert the Windows XP bootable CD into the computer.
2) When prompted to press any key to boot from the CD, press any key.
3) Once in the Windows XP setup menu press the "R" key to repair Windows.
4) Log into your Windows installation by pressing the "1" key and pressing enter.
5) You will then be prompted for your administrator password, enter that password, if none was set, then just press enter to bypass it.
6) Copy the below two files to the root directory of the primary hard disk. In the below example we are copying these files from the CD-ROM drive letter, which in this case is "e." This letter may be different on your computer.
copy e:\i386\ntldr c:\
copy e:\i386\ntdetect.com c:\
Once both of these files have been successfully copied, remove the CD from the computer and reboot.
BEST OF LUCK!