A blue screen means Windows hit an error it couldn't recover from. One blue screen isn't cause for alarm. Repeated ones usually come from a bad driver, a recent update, failing memory or storage, or overheating. The stop code on the screen points to the cause.
Common causes
Faulty or outdated driver
Drivers for graphics, network, docking stations, and printers are frequent causes.
Recent update or software
Blue screens that start right after an update or new program point to that change.
Failing memory
Bad RAM causes random crashes with changing stop codes.
Failing drive
Storage errors can crash Windows and risk data loss.
Overheating
Dust-clogged fans and blocked vents can cause crashes under load.
How to fix it, step by step
- 1
Write down the stop code
Note the stop code (for example, MEMORY_MANAGEMENT or IRQL_NOT_LESS_OR_EQUAL) — it guides the fix.
- 2
Undo recent changes
Uninstall recent updates, drivers, or programs, or use System Restore to go back to a point before the crashes.
- 3
Update drivers
Install current drivers from the computer manufacturer, especially graphics, chipset, and dock drivers.
- 4
Repair Windows files
Open Command Prompt as administrator and run sfc /scannow, then DISM /Online /Cleanup-Image /RestoreHealth.
- 5
Test memory and the drive
Run Windows Memory Diagnostic, and check the drive's health with the manufacturer's tool.
When to call a technician
Frequent blue screens can be a sign of failing hardware. Back up important files right away and have the computer checked before it stops starting altogether.
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Frequently asked questions
Is a blue screen a virus?
Rarely. Most blue screens are caused by drivers, updates, or hardware problems.
Should I worry about one blue screen?
Not usually. If it happens again, start troubleshooting and make sure your files are backed up.
Where can I find the blue screen details later?
Event Viewer and Reliability Monitor in Windows record crash details, including the stop code and time.