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Business Notebooks: Boot mode cannot be changed from UEFI to Legacy in Boot Menu 

Summary: Information about resolving a boot menu issue seen on the newer business notebook models from Dell.

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.
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Symptoms

Symptom

Owners of a Dell business notebook may report that boot mode cannot be changed from UEFI to Legacy in the Boot Menu. You can enter the Boot Menu by pressing F12 after the system powers on.

Affected systems

Impacted Platform

Impacted BIOS

Latitude 5491

1.7.2

Latitude 5591

Precision 3530

Precision 7530

1.8.0

Precision 7730

Latitude 5290

1.8.1

Latitude 5490

Latitude 5590

Latitude 7290

1.9.1

Latitude 7390

Latitude 7490

Latitude 7390 2-in-1

1.8.1

Latitude 5290 2-in-1

1.7.1

Latitude 5280

1.14.1

Latitude 5480

Latitude 5580

Precision 7720

1.14.0

Precision 7520

Latitude 7280

1.14.0

Latitude 7380

Latitude 7480

Latitude 5289 2-in-1

1.17.0

Latitude 7389 2-in-1

Latitude 5285 2-in-1

1.5.1

Latitude 7285 2-in-1

1.3.0
 

Resolution

Solution

Updating the latest BIOS version on the computer will help resolve the issue. To download and install the latest BIOS:

Warning: Dell recommends disconnecting any external devices like external hard disk drives, printers, scanners before updating the BIOS.
 
Warning: Dell laptops must have the battery installed and charged to at least 10% before you begin the BIOS update. Dell recommends connecting the laptop to AC power before proceeding with the update process.
 
SLN316657_en_US__1icon Note: To learn more about updating the BIOS on a Dell computer, see the Dell knowledgebase article Dell BIOS Updates.

  1. Browse to the Dell Drivers & downloads page:

  2. Ensure your System Type is selected

  3. Select the Operating System

  4. Under Category, select BIOS

  5. Locate the latest System BIOS

  6. Click Download and save the file to your computer

  7. Open File Explorer and browse to the location where the downloaded file is saved

  8. Double-click the BIOS setup file and follow the on-screen instructions to complete the installation process

Affected Products

Latitude 5280/5288, Latitude 5285 2-in-1, Latitude 5289 2-in-1, Latitude 5290 2-in-1, Latitude 5290, Latitude 7280, Latitude 7285 2-in-1, Latitude 7290, Latitude 7380, Latitude 7389 2-in-1, Latitude 7390 2-in-1, Latitude 7390, Latitude 5480/5488 , Latitude 5490, Latitude 5491, Latitude 7480, Latitude 7490, Latitude 5580, Latitude 5590, Latitude 5591, Precision 3530, Precision 7520, Precision 7530, Precision 7720, Precision 7730 ...
Article Properties
Article Number: 000135647
Article Type: Solution
Last Modified: 21 Feb 2021
Version:  4
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