CDrom.sys Is Corrupted? Look Here!

Solve the problem of corruption of CDrom.sys file in Windows 10/11 system

When you insert a CD in your DVD drive, you may encounter an error with a corruption of the CDrom.sys file. This article will provide some effective solutions.

Causes of CDrom.sys file corruption

The CDrom.sys file is a software component of the Microsoft Windows operating system. It is an optical storage device class driver located in the C:\Windows\System32\drivers directory. Causes of CDrom.sys corruption or loss may include:

• System files are corrupted
• Virus or malware attacks
• Corrupted registry key
• Hardware incompatible

How to fix corruption of CDrom.sys file in Windows 10/11 system

Method 1: Update DVD/CD-ROM driver

Device drivers play an important role in hardware and computers, so make sure to update the drivers in a timely manner. The operation steps are as follows:

Step 1. Right-click the Start menu and select Device Manager .

Step 2. Expand the DVD/CD-ROM drive , then right-click on your DVD drive and select Update Driver .

Step 3. Click Automatically Search Driver and follow the on-screen instructions to complete the remaining steps.

Method 2: Run hardware and device troubleshooting program

Hardware incompatibility issues are a common cause of CDrom.sys loss or damage . You can run hardware and device troubleshooting programs to find and fix device and hardware issues. The operation steps are as follows:

Step 1. Run the command prompt as administrator.

Step 2. In the command window, type msdt.exe -id DeviceDiagnostic and press Enter to start the hardware and device troubleshooter .

Step 3. Click Advanced in the lower left corner > tick Apply Repair Automatically > Click Next > Select Device from the list > Click Apply This Reply .

Step 4. Restart your computer.

Method 3: Run SFC and DISM

If the driver files are lost or corrupted, you can use SFC and DISM in combination to detect and repair them. The operation steps are as follows:

Step 1. Run the command prompt with administrator privileges.

Step 2. Type sfc /scannow and press Enter .

Step 3. When finished, restart the computer to see if CDrom.sys is corrupted again. If it is still corrupt, run the following command in the elevated command prompt:

dism /online /cleanup-image /restorehealth

Method 4: Delete and recreate the corrupted registry key

In some cases, your registry keys may be modified without your knowledge. If the registry key is corrupt, you must delete the damaged registry key and recreate a new one. The operation steps are as follows:

Step 1: Delete the corrupted registry key

Step 1. Press Win R key to open the Run dialog box.

Step 2. Type regedit.exe and press Enter to open the Registry Editor .

Step 3. Navigate to the following path:

HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Control/Class{4D36E965-E325-11CE-BFC1-08002BE10318}

Step 4. In the right pane, locate the UpperFilters item and the LowFilters item and select Delete .

Step 5. Restart the system for the changes to take effect.

Step 2: Recreate the registry key

Step 1. Type regedit.exe in the Run dialog box and press Enter .

Step 2. Navigate to the following keys:

HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Services/atapi

Step 3. Right-click atapi > select New > Item > Rename it to Controller0 .

Step 4. Click Controller0 > Right-click any blank space > Select New > DWORD (32-bit) Value > Rename the key to EnumDevice1 > Change the value data to 1 > Click OK .

Step 5. Close the Registry Editor and save the changes.

Method 5: Use antivirus software to scan your computer

Malware or virus attacks can also cause CDrom.sys errors, such as CDrom.sys corruption or CDrom.sys blue screen of death. If this is the case, antivirus software can help you solve the problem. Here is how to use Windows Defender for a full scan:

Tip: Virus or malware attacks can lead to unexpected data loss, so you'd better back up important files in advance.

Step 1. Press the Win I key to open Windows settings .

Step 2. Go to Update & Security > Windows Security > Virus and Threat Protection .

Step 3. Click Scan Options > Check Full Scan > Click Scan Now to start scanning.

Conclusion

With the above method, your CDrom.sys file may be fixed and your system is able to communicate with a CD or DVD drive. If you don't use CD or DVD trays for a long time, it's also important to test regularly.

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