I didn´t have an installation DVD download. However, I have fixed the problem using the follow procedure:

1) I open the Dell DataSafe Local Backup software;

2) In this software, I have an option to create system recovery media. I create this media in a USB flash drive.

(Note: As informed in the software, this process make a copy of Recovery partition of my notebook in USB).

3) After that, I started a notebook via USB and started the restore. When I started the restore process, appeared a new option: 'Back to Factory Configuration'. This option is not able without a recovery media.

4) So, All my notebook was restored to factory configuration and the problems was fixed.

So, thanks for your feedback. I hope that our answer will help others.

Thanks for all.

See my Windows Reinstallation Guide/A Clean Install of Windows 7:

http://dellwindowsreinstallationguide.com/

If you don't have an installation DVD download a Digital River .iso and use the activation backup and recovery program:

http://dellwindowsreinstallationguide.com/download-microsoft-windows-and-office/download-microsoft-windows/windows-7-sp1-iso-download/

http://dellwindowsreinstallationguide.com/a-clean-install-of-windows-7/microsoft-product-activation/the-activation-backup-and-recovery-program-windows-7-version/

More one thing,

The problem of my notebook were in Windows file system. The file system related to services was corrupted and some services never started.

The recovery process without Recovery Media did not restored the file system to its original state, in fact, the laptop was restored but not the windows filesystem.

Could you explain what you meant when you said-the laptop was restored but not the windows filesystem?