What is WIFI_AUTOPREP_FAIL?
The WLAN AutoConfig service (Wlansvc) failed to start, causing all wireless network adapters to become unresponsive and preventing the PC from scanning or connecting to Wi-Fi networks.
Common Causes
- Corrupt ndis.sys driver
- Disabled dependency services (e.g. Native WiFi Filter)
- Corrupt system registry
Step-by-Step Fix Guide
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1
Start WLAN AutoConfig manually
Starting the service manually tests if it can run. If it fails with dependencies error, check Native WiFi Filter.
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2
Reset network stack using Command Prompt
Resetting the IP/Winsock stacks clears out bad configuration that blocks WLAN startup.
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3
Enable WLAN dependency services in Services.msc
Commands & Diagnostics
net start wlansvcnetsh winsock resetnetsh int ip resetStill Need Help?
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