Computer gets Windows 11 green screen
I haven’t seen a green screen on my computer in ever I think… But now yesterday firefox was output tons of logs. I asked cursor to reduce it. It didn’t. So green screen. Then I rebooted, and only started cursor… Left computer alive over night, green screen again.
The error was: KERNEL_SECURITY_CHECK_FAILURE (0x139)
Steps to Reproduce
No idea
Expected Behavior
Not get green screen?
Operating System
Windows 10/11
Current Cursor Version (Menu → About Cursor → Copy)
KERNEL_SECURITY_CHECK_FAILURE is a Windows kernel-level error, and it’s usually not caused directly by apps like Cursor. More often it’s due to drivers, antivirus software, or hardware issues. I also noticed you’re on a Windows Insider build (26220), and preview builds can be unstable.
To dig in, I’ll need a bit more info:
Check Windows Event Viewer:
Open Event Viewer
Windows Logs > System
Find entries around the time of the crash
Share a screenshot or copy the error details
Have you updated any drivers recently? Especially GPU, antivirus, or any kernel-mode drivers
What extensions are installed in Cursor? (Ctrl + Shift + P > Extensions: Show Installed Extensions)
What other software was running in the background during both crashes?
For now, you can try:
Update all drivers, especially GPU
Temporarily disable antivirus or firewall for testing
Run Cursor without extensions: cursor --disable-extensions
If it only crashes with Cursor and you have a memory dump (.dmp file), we can analyze it to find the exact cause.
I did check event viewer and it had some weird ass reports about one of my harddrives (specifically the one with OS on) and I did make adjustments to PCI Express power to never restrict power… It might’ve been the cause…
Also YES I did update bios a week or so ago, this might be the culprit! It also had some pretty substantial changes to the bios.
Also I update nvidia graphics drivers this morning. Ran sfc /scannow and dism repair online restore health command.
I am running with HW Info on right monitor now so I can see if overheating is the problem also. Because Green screen will show on main monitor and other monitor will just be frozen with whatever app is up there.