A persistent operating system error on your Dell Inspiron 1525 laptop requires more than just a system restore as there is a problem with a driver that a system restore cannot correct. A full factory reset of the laptop wipes the hard drive clear of all data including existing driver settings and programs and installs the original operating system back to the hard drive. Once cleared, previous computer files and programs are non-recoverable.
Press "Power" on the Inspiron 1525, and continuously press "F8" on the keyboard when the Dell logo appears on the laptop's screen.
Press the down arrow to highlight "Repair Your Computer," and press "Enter" to select the highlighted onscreen option.
Click your preferred keyboard layout, and click "Next" to continue with the laptop's restoration process.
Type "administrator" in the username field, click "OK" and click "Dell Factory Tools."
Click "Dell Factory Image Restore," and click "Next." Click the checkbox next to the hard drive reformat confirmation, and click "Next."
Click "Finish" to reboot the OS after the restore process finishes, which can take up to 10 minutes.