Hi Arnaud,
Glad to know that you have resolved the issue. We really appreciate your effort to resolve the issue.
I am sorry to hear that you are facing issues with the CD drive of the computer. If
there is a yellow triangle with an exclamation mark in it, then it indicates
that there are some issues with the hardware or drivers. I suggest you to try the following steps and check if it helps.
What is the make and model of the computer?
Method 1: Run the Hardware Troubleshooter
The Hardware Troubleshooter is an automated tool which checks the hardware connected to the computer for any known issues and provides the details on how to fix them. Follow these steps to run the troubleshooter.
a) Press “Windows Logo” + “W” keys from the keyboard.
b) Type “Troubleshooting” in the search bar and press “Enter”.
c) In the “Troubleshooting” window, click on “View All” on the left pane.
d) Click on “Hardware and Devices”.
e) Click on “Advanced” and then click on “Run as Administrator”.
f) Click “Next” and follow the on-screen instructions to complete the troubleshooting process.
Please check the troubleshooting report and share the details with us. You may also try the suggestions given by the troubleshooter and check if that resolves the issue. If that doesn’t help, then try the next method.
Method 2: Uninstall and Reinstall the Drivers
Uninstall the Device Drivers
a) Press “Windows Logo” + “X” keys on the keyboard.
b) Click on “Device Manager” from that list.
c) Search for the DVD Drive from the device list, right click on it and then select “Uninstall”. On the un-installation window, if you have an option: “Delete the driver software for this device” you may select that and then remove the corrupted drivers from the computer.
d) Follow the on-screen instructions to complete it and the restart the computer if prompted.
After the restart, please open the Device Manager again and then click on the “Scan for hardware changes” button. Check if Windows 8.1 detects the DVD Drive and installs an appropriate driver automatically.
Hope this helps.
Please post back if the issue persists and we will be glad to assist you further.