If your Dell L400 keyboard does not working, you may try to install this driver. This is Dell Enhanced Quietkey (PS2) / Performance (USB) Keyboards Driver. Below is the installation guideline for this driver:
- Download the dt201a25.exe file.
- Double click on the dt201a25.exe begin.
- The Self-Extracting Driver Installation window appears and prompts to extract files to C:\DELL\DRIVERS\R34645.
- Leave all of the default settings and click Unzip or OK. If the directory doesn't exist, you'll be prompted to create one. Click Yes. A Self Extractor window appears and indicates C:\DELL\DRIVERS\R34645 files were extracted.
- Click OK. Follow the on-screen installation instructions in the window.
This driver is also suitable for the following Dell systems:
- Dimension 4200 (Germany and Japan Only)
- Dimension 2100
- Dimension 4300
- Dimension 4400
- Dimension 8100
- Dimension 8200
- Inspiron 4000
- Inspiron 2500
- Inspiron 5000e
- Inspiron 2000 (Japan Only)
- Inspiron 2100
- Inspiron 4100
- Inspiron 8000
- Inspiron 8100
- Latitude C500
- Latitude C510
- Latitude CPt C
- Latitude CPt V
- Latitude CPt S
- Latitude CPx H
- Latitude CPx J
- Latitude CSx H
- Latitude LS
- Latitude C600
- Latitude C610
- Latitude C800
- Latitude C810
- Latitude L400
- Latitude V700
- Latitude CS R
- OptiPlex GX50
- OptiPlex GX150
- OptiPlex GX240
- OptiPlex GX400
- Dell Precision WorkStation 330
- Dell Precision WorkStation 340
- Dell Precision WorkStation 530
Alternatively, you can try the Free Driver Scanner.
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