How to Download and Fix C_unknown.inf Errors

Last Updated: 12/12/2023
[Time Needed for Reading: ~4-6 minutes]

The development of Windows 10 by Microsoft prompted the latest creation of c_unknown.inf. It is also known as a Setup Information file (file extension INF), which is classified as a type of Driver (Setup Information) file.

c_unknown.inf was initially released with Windows 8 on 08/01/2012 for the Windows 8 Operating System. The most recent version [file version 10] was introduced on 07/29/2015 for Windows 10. c_unknown.inf is included in Windows 10, Windows 8.1, and Windows 8.

In this short article, you will discover detailed file information, steps for troubleshooting INF file problems with c_unknown.inf, and list of free downloads for every version that exists in our comprehensive file directory.

File Analysis Provided by Jason Geater (Author)


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File Overview


General Information
File Name: c_unknown.inf
File Extension: INF file extension
File Type: Driver
Description: Setup Information
User Popularity Rating:
 
Developer and Software Information
Software Program: Windows 10
Developer: Microsoft
Software: Windows
Software Version: 10
File Details
File Size (Bytes): 1176
Oldest File Date: 07/26/2012
Latest File Date: 03/18/2017


What are c_unknown.inf Error Messages?


c_unknown.inf Blue Screen of Death (BSOD) Errors

There are a number of reasons why you could be encountering issues with c_unknown.inf. Most of the issues concerning inf files involve Blue Screen of Death (BSOD) errors. These types of c_unknown.inf errors can be cause by hardware problems, outdated firmware, corrupt drivers, or other software-related (eg. Windows update) issues. Some of these errors include:

A problem has been detected and Windows has been shut down to prevent damage to your computer. The problem seems to be caused by the following file: c_unknown.inf.

:( Your PC ran into a problem that it couldn't handle, and now needs to restart. You can search for the error online: [BSOD] (c_unknown.inf).

<strong>STOP 0x0000001E: KMODE EXCEPTION NOT HANDLED (c_unknown.inf)</strong><br /><strong>STOP 0x0000003B: SYSTEM SERVICE EXCEPTION (c_unknown.inf)</strong><br /><strong>STOP 0x00000050: PAGE FAULT IN A NONPAGED AREA (c_unknown.inf)</strong><br /><strong>STOP 0×0000007A: KERNEL DATA INPAGE (c_unknown.inf)</strong><br /><strong>STOP 0x0000000A: IRQL NOT LESS EQUAL (c_unknown.inf)</strong><br /><strong>STOP 0x0000007E: SYSTEM THREAD EXCEPTION NOT HANDLED (c_unknown.inf)</strong>

It's Critical to Resolve Blue Screen of Death Errors

In the majority of cases, you will encounter c_unknown.inf BSOD errors after you've installed new hardware, software (Windows), or performed a failed Windows Update. In other cases, software corruption caused by a malware infection can lead to c_unknown.inf Blue Screen of Death errors. Therefore, it's critical to make sure your anti-virus is kept up-to-date and scanning regularly.


GEEK TIP : As a rule of thumb, it's always a good idea to create a Windows "Snapshot" backup / System Restore Point before making any hardware or software changes to your computer. That way, it's very easy to restore your system in the unfortunate event you encounter a c_unknown.inf Blue Screen of Death error after recent changes.



How to Fix c_unknown.inf Errors in 3 Steps (Time to complete: ~5-15 minutes)

If you're encountering one of the error messages above, follow these troubleshooting steps to resolve your c_unknown.inf issue. These troubleshooting steps are listed in the recommended order of execution.


Step 1: Restore your PC back to the latest restore point, "snapshot", or backup image before error occurred.

To begin System Restore (Windows XP, Vista, 7, 8, and 10):

  1. Hit the Windows Start button
  2. When you see the search box, type "System Restore" and press "ENTER".
  3. In the search results, find and click System Restore.
  4. Please enter the administrator password (if applicable / prompted).
  5. Follow the steps in the System Restore Wizard to choose a relevant restore point.
  6. Restore your computer to that backup image.

If the Step 1 fails to resolve the c_unknown.inf error, please proceed to the Step 2 below.

Step 2: Run SFC (System File Checker) to restore the corrupt or missing c_unknown.inf file.

System File Checker is a utility included with every Windows version that allows you scan and restore corrupted system files. Use the SFC tool to fix missing or corrupt c_unknown.inf files (Windows XP, Vista, 7, 8, and 10):

  1. Hit the Windows Start button
  2. In the search box, type "cmd" but DO NOT PRESS "ENTER".
  3. Press and hold "CTRL-Shift" on your keyboard while pressing "ENTER".
  4. You'll be prompted with a permission dialog box.
  5. In the box, click "YES".
  6. You should have a black screen with a blinking cursor.
  7. In that black screen, type "sfc /scannow" and hit "ENTER".
  8. SFC will begin scanning for c_unknown.inf issues and any other system file problems.
  9. Follow any on-screen commands to complete the process.

Please be aware that this scan might take a while, so please be patient while it is working.

If this Step 2 fails as well, please proceed to the Step 3 below.

sfc /scannow

Step 3: Perform a Windows Update.

When the first two steps haven't solved your issue, it might be a good idea to run Windows Update. Many c_unknown.inf error messages that are encountered can be contributed to an outdated Windows Operating System. To run Windows Update, please follow these easy steps:

  1. Hit the Windows Start button
  2. In the search box, type "Update" and press "ENTER".
  3. In the Windows Update dialog box, click "Check for Updates" (or similar button depending on your Windows version)
  4. If updates are available for download, click "Install Updates".
  5. After the update is completed, restart your PC.

If Windows Update failed to resolve the c_unknown.inf error message, please proceed to next step. Please note that this final step is recommended for advanced PC users only.



If Those Steps Fail: Download and Replace Your c_unknown.inf File (Caution: Advanced)

If none of the previous three troubleshooting steps have resolved your issue, you can try a more aggressive approach (Note: Not recommended for amateur PC users) by downloading and replacing your appropriate c_unknown.inf file version. We maintain a comprehensive database of 100% malware-free c_unknown.inf files for every applicable version of Windows. Please follow the steps below to download and properly replace you file:

  1. Locate your Windows operating system version in the list of below "Download c_unknown.inf Files".
  2. Click the appropriate "Download Now" button and download your Windows file version.
  3. Copy the file into the appropriate directory for your Windows version:

  4. Windows 8: C:\Windows\inf\
    Windows 8: C:\Windows\System32\DriverStore\FileRepository\_x86_bbd2a4bebc6decea\
    Windows 8.1: C:\Windows\inf\
    Windows 8.1: C:\Windows\System32\DriverStore\FileRepository\_x86_ae5bc3abd9301ddf\
    Windows 10: C:\Windows\inf\
    Show 1 more directory +
    Windows 10: C:\Windows\System32\DriverStore\FileRepository\_x86_984c76fd32c4e15c\
  5. Restart your computer.

If this final step has failed and you're still encountering the error, you're only remaining option is to do a clean installation of Windows 10.


GEEK TIP : We must emphasize that reinstalling Windows will be a very time-consuming and advanced task to resolve c_unknown.inf problems. To avoid data loss, you must be sure that you have backed-up all of your important documents, pictures, software installers, and other personal data before beginning the process. If you are not currently backing up your data, you need to do so immediately.



Download c_unknown.inf Files (Malware-Tested 100% Clean)


CAUTION : We strongly advise against downloading and copying c_unknown.inf to your appropriate Windows system directory. Microsoft typically does not release Windows INF files for download because they are bundled together inside of a software installer. The installer's task is to ensure that all correct verifications have been made before installing and placing c_unknown.inf and all other INF files for Windows. An incorrectly installed INF file may create system instability and could cause your program or operating system to stop functioning altogether. Proceed with caution.

Windows 10
Windows 8.1
Windows 8


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prnkmcl2.inf Setup Information Windows 8 5982 C:\Windows\System32\LogFiles\WMI\RtBackup\
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WLANAP_profile_v1.xsd XML Schema Definition Windows 8 7504 C:\Windows\L2Schemas\
WLAN_profile_v1.xsd XML Schema Definition Windows 7 15591 C:\Windows\L2Schemas\
WLAN_profile_v1.xsd XML Schema Definition Windows XP 15263 C:\Windows\L2Schemas\


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