Macrium Reflect is a very good image backup free program.
For future reference, your Dell should have a factory Image restore, which is what you have instead of a DVD.
Check your manual, it should look something like this, my Dell laptop manual is for Vista but yours should be similar.
Windows Vista: Dell Factory Image Restore
1 Turn on the computer. When the Dell logo appears, press <F8> several times to access the Vista Advanced Boot Options window.
2 Select Repair Your Computer. The System Recovery Options window appears.
3 Select a keyboard layout and click Next.
4 To access the recovery options, log on as a local user. To access the
command prompt, type administrator in the User name field, then click OK.
5 Click Dell Factory Image Restore.
NOTE: Depending upon your configuration, you may need to select Dell Factory Tools, then Dell Factory Image Restore.
The Dell Factory Image Restore welcome screen appears.
6 Click Next.
The Confirm Data Deletion screen appears.
NOTICE: If you do not want to proceed with Factory Image Restore, click Cancel.
7 Click the check box to confirm that you want to continue reformatting the hard drive and restoring the system software to the factory condition, and then click Next.
The restore process begins and may take five or more minutes to complete. A message appears when the operating system and factory-installed applications have been restored to factory condition.
8 Click Finish to reboot the system.
It's much easier to use Macrium Reflect and restore the image from you current running system.