USB WiFi not working with 100417CF Access Violation error

While using a USB WiFi dongle if you receive a 100417CF Access Violation error, then this post will be able to help you. You can follow some simple steps to fix this error. The complete error message reads:

Access violation at address 100417CF in module ‘RaWLAPILdll”. Read of address 00000000.

What causes USB WiFi 100417CF Access Violation error?

This error usually occurs due to faulty USB dongles, outdated drivers, disk errors, corrupt network settings, misconfigured settings or if the access is blocked by Firewall.

Fix USB WiFi not working with 100417CF Access Violation error

If you receive Access violation at address 100417CF error while using a USB WiFi dongle on your Windows PC, follow these suggestions to resolve the issue:

1. Run the Network Adapter Troubleshooter
2. Restart the WLAN Autoconfig Service
3. Update the Network Drivers
4. Modify Power Saving Options
5. Run these Network Commands
6. Run ChkDsk
7. Reset Network Settings

Now let us see these in detail.

1] Run the Network Adapter Troubleshooter

Before getting started with different troubleshooting methods to fix this issue, try running Microsoft’s Automated Troubleshooting Services as a first step to diagnose and repair common Network issues. Here’s how:

1. Press the Windows key + I to open Settings.
2. Scroll down and click on Troubleshoot > Other Troubleshooters.
3. Click on Run beside Network Adapter and follow the instructions on-screen.

2] Restart the WLAN Autoconfig Service

The WLAN AutoConfig service selects the wireless networks the computer will automatically connect to. This incorporates automatically selecting and connecting to a more preferred wireless network when one becomes available. Restarting this service can help fix USB network adapter-related issues. Here is how you can do it:

1. Press the Windows key + R to open the Run dialog box.
2. Type services.msc and hit Enter.
3. Scroll down and search for WLAN AutoConfig.
4. Right-click on the service and select Restart.
5. Once done, restart your device and check if the issue is fixed.

3] Update the Network Drivers

Outdated or corrupted network drivers can sometimes also cause errors with the USB WiFi Adapter. Consider updating the network drivers to fix this issue. Here is how you can update the Network Drivers of your device.

4] Modify Power Saving Options

The power-saving settings can sometimes disable the USB ports of your PC to decrease power consumption. Modifying these settings can help fix the USB access violation error. Here’s how:

1. Click on Start and search for Device Manager.
2. Expand the option Universal Serial Bus Controllers.
3. Right-click on your USB WiFi Adapter and select Properties.
4. In the Properties window, navigate to the Power Management tab.
5. Now uncheck the option Allow the computer to turn off this device to save power.
6. Click on Ok to save the changes.

5] Run these Network Commands

Running the network commands will reset the TCP/IP stack, renew the IP address, Reset Winsock and flush the DNS client resolver cache. Here’s how you can do it:

• Press the Windows key, search for Command Prompt, and select Run as Administrator.
• Type the following commands one by one and hit Enter.

  netsh winsock reset 
  netsh int IP reset 
  ipconfig /release 
  ipconfig /renew 
  ipconfig /flushdns

• Restart your device once done.

6] Run ChkDsk

Run the command line ChkDsk and restart your computer and then try again.

7] Reset Network Settings

If none of these steps were able to help you, reset the network settings of your device. Performing a network reset will remove and then reinstall all your network adaptors. It will also reset all related settings to their defaults. Here is how you can do it:

1. Press the Windows key + I to open Settings.
2. Navigate to Network & Internet > Advanced network settings > Network Reset.
3. Click on Reset Now beside Network Reset and follow the instructions on-screen.

Fix: TP-Link WN821N WiFi adapter not working or detecting networks

How do I fix the WiFi adapter on Windows?

The WLAN AutoConfig service selects the wireless networks the computer will automatically connect to. This incorporates automatically selecting and connecting to a more preferred wireless network when one becomes available. Restarting this service can help fix USB network adapter-related issues.