Try to image your device with below given steps:
Log on to Windows as an administrator
Open Dell Backup and Recovery by clicking Start, pointing to All programs and clicking Dell Backup and Recovery
Click Restore System
In the Restore System window, select the backup file you want to use to restore your system in the drop-down menu and click Next
In the Confirm window, read the caution message and click both check boxes to confirm that you want to overwrite your computer’s operating system with the selected backup file, and that the restore process cannot be interrupted or undone
Click Start. Your computer will restart into the Windows Recovery Environment. Dell Backup and Recovery will first erase your operating system partition and then install the selected backup
When the process completes a success message appears. Click Finish.
You can also take help from Dell Latitude 3450 Manual.
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