System_thread_exception_not_handled

Question

My PC wont connect to wifi, so I tried resetting network settings, and wiping my pc from safe mode and recovery mode, everytime I get a blue screen that says System_thread_exception_not_handled rtwlanu.sys, I’ve tried rolling back drivers and windows update but my system says I haven’t installed anything in nearly two weeks. I ran a system scan from my command prompt which told me there were no intregiry issues, as well as a system scan from my malware protectant which also said nothing was compromised.

Answer 1

Hi Jacob. I'm Greg, awarded MVP for eleven years, Volunteer Moderator, and Independent Advisor here to help you until this is resolved.

1. See if you can System Restore to a point before the problem began following this guide: https://www.windowscentral.com/how-use-system-r...

System Restore is your first line of defense and can take you back to a point before a problem began. If it doesn't help then you can undo it. Read about it first in the tutorial above and then try restoring to just before this started.

If the problem repeats or System Restore doesn't work then check which Windows Updates were installed at Settings > Update & Security > Windows Updates > Update History, uninstall them there or System Restore again, then immediately check for and block the Updates with the Hide Updates tool explained here: https://www.howtogeek.com/223864/how-to-uninsta...

2. Try possible fixes for the crashes caused by Realtek network driver:

https://appuals.com/how-to-fix-bsod-caused-by-r... (Avoid ad links which intrude into editorial copy, especially avoid Restoro ad)

http://windowsbulletin.com/how-to-fix-rtwlanu-s...

3. Update your drivers and BIOS/UEFI firmware from PC or motherboard maker's Support Downloads web page, using the full model number, Serial Number or Dell Service Tag on sticker. Compare the latest drivers available for download with the ones presently installed in Device Manager reached by right clicking the Start button. Make sure you have the latest BIOS or UEFI firmware, Chipset, Display (Video), Sound, USB3, Bluetooth, Network and all other drivers, or else download and install the latest now.

Updating drivers from the Device Manager or Windows Update is rarely enough. The most basic thing we need to learn to maintain a PC is keep the latest manufacturer's drivers installed from their Support Downloads web page.

4. Go over this checklist to make sure the install is set up correctly, optimized for best performance, and any needed repairs get done: http://answers.microsoft.com/en-us/windows/wiki...

Start with Step 4 to turn off Startup freeloaders which can conflict and cause issues, then Step 7 to check for infection the most thorough way, then step 10 to check for damaged System Files, and also Step 17 to test a new Local Admin account. Then if necessary continue with the other steps to go over your install most thoroughly.

5. If nothing else works then do a Repair Install, by installing Media Creation Tool, open tool and choose to Upgrade Now. This reinstalls Windows while keeping files, programs and most settings in place, is the most stable method to advance to the latest version, and solves most problems. http://windows.microsoft.com/en-us/windows-10/m...

I hope this helps. Based on what you report back I can answer any questions and may have other steps to perform.

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