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Error Code 40 – What is it?
It is a device driver error that users encounter on any Windows 2000 and later operating systems. It occurs when the peripheral device that you connect to your PC cannot be accessed due to a change in the system registry.
This is due to the presence of invalid sub-keys of device driver in the system registry.
It is a common error that users come across and appears on your PC with either of the following messages:
“Information in the registry entry for this driver is invalid”
“Windows cannot access this hardware because its service key information in the registry is missing or recorded incorrectly. (Code 40)”
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As mentioned above, the error code is triggered when the device driver’s invalid sub-keys appear in the registry, effectively changing it. This happens when the windows system files get damaged due to the following factors:
- An incomplete program uninstallation
- An incomplete program installation
- Hardware is not removed properly
- System recovery from viruses
- An improper system shut down
Factors such as incomplete installations or uninstallations or an improper system shut down can cause files to become damaged that threaten the health of your computer.
Removing viruses from the computer is also another factor as it removes the entries in the Windows system files which contain the viruses including spyware or malware
Further Information and Manual Repair
Fixing Error Code 40 is similar to fixing to other device manager error codes. Here are a few methods you can try.
Method 1 – Use System Restore
You can use system restore to eliminate the problem. Here is how you can use it:
- Log in using an Administrator account
- Click ‘Start’ button and select All Programs > Accessories > System Tools > System Restore
- Click ‘Restore my computer to an earlier time’ and click ‘Next’
- Select the last Windows restore point from the ‘On this list, click a restore point’ list and click ‘Next’
- Click ‘Next’ on the confirmation window to proceed
- Restart your PC after restoration is complete
By restoring the system via a last saved system checkpoint, you can obtain undamaged Windows system registry files that can help avert the error code.
Method 2 – Manually uninstall then reinstall the device driver
If using system restore also does not work in removing the error code, you may have to resort to manually uninstalling and then reinstalling the device driver causing the problem.
This would be necessary since the remaining incomplete files due to a partial removal or installation of programs is what contributes to the error code. By uninstall and reinstalling the device driver program, it would lead to completion of the files.
You can do this by firstly logging in as Administrator and open Device Manager. Select the device that is causing the problem and double click it and make sure that the peripheral is connected properly to the PC. Upon opening, click on the ‘Driver’ tab and then select ‘Update Driver’.
Make sure to refer to your system documentation that you received with your PC or computer to check for the motherboard details and driver specifics.
Method 3 – Use software to automatically download the driver
Manually uninstalling and reinstalling the driver will do the trick, however it may be time-consuming especially when you would have to resort to your hardware user manual.
Therefore, using a program such as Driver Assist can save you a lot of time and frustration in having your device to work properly on your computer.
Driver Assist, with its user-friendly approach to help you fix your PC issues, comes with an integrated database that detects which drivers you need to reconfigure within just a few seconds and downloads it automatically.
It further ensures that your drivers are installed in its entirety leaving no room for any incomplete files to remain that create Error Code 40.
It also has the added advantage of being able to backup and restore your files should there be the slightest possibility of system files damage.
Thus, registry damage can be averted by letting the software roll back the system files to an earlier healthy checkpoint. Driver Assist is the answer to fixing your PC error codes accurately and quickly.
Click here to download Driver Assist to fix Error Code 40 quickly and effectively!
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