Why Does My Computer Keep Blue Screening? How to Find the Cause and Fix It

Your computer keeps blue screening because Windows hit an error it could not safely recover from, so it stopped itself to protect your files. Microsoft calls this a stop error or a bug check. Most of the time the cause is a driver, the small piece of software that lets Windows talk to a part like your graphics card or Wi-Fi.

Here is the part most guides bury. Microsoft has published its own numbers. In its guide for support agents, it says about 70 percent of these crashes come from third party driver code. About 10 percent come from hardware. About 5 percent come from Microsoft's own code. The last 15 percent cannot be traced because memory was too damaged to read. So before you blame your RAM or buy a new laptop, look at your drivers.

The Short Answer

It is a safety stop. Windows halts on purpose when something could corrupt your files or the system.
Drivers first. Microsoft's data puts third party drivers behind about 70 percent of crashes.
Read the screen. The stop code and any file name ending in .sys tell you where to look.
Undo the last change. New hardware, a new driver, a new app or a big update is the usual trigger.
Repair system files. Run DISM, then sfc /scannow, from an admin Command Prompt.
Test the hardware last. Memory, the drive and heat are real causes, but less common ones.

What the Blue Screen Is Telling You

A blue screen is not a virus and it is not Windows breaking for no reason. When Windows sees a condition that could lead to lost data or a security hole, it stops everything. Microsoft's support guide lists the common causes as a hardware device, its driver, or software.

Microsoft's numbers matter because they change the order you check things in. If 70 percent of crashes trace back to drivers, a driver update or rollback is your best first bet. Hardware comes later.

Microsoft also notes that an ordinary app like a chat app or Notepad can trigger a crash, but it is rarely the real cause. The app is usually just the thing that poked a bad driver.

Your Blue Screen Might Be Black Now

On Windows 11 version 24H2 and later, Microsoft replaced the blue screen with a black one. Help Net Security reported the rollout on July 23, 2025. The new screen drops the sad face and the QR code. It shows a short message with the stop code and the faulty driver. It is the same error with a new color, so everything in this guide still applies.

Step One Is to Write Down the Stop Code

The screen shows a stop code near the bottom, such as PAGE_FAULT_IN_NONPAGED_AREA or MEMORY_MANAGEMENT. If it also shows a module name, that is the file that was running when Windows stopped. A name ending in .sys is a driver.

Take a phone photo of the screen. It may only show for a moment before the computer restarts.

What the Common Stop Codes Point To

These come from Microsoft's troubleshooting guide for support agents.

DRIVER_IRQL_NOT_LESS_OR_EQUAL. A driver used memory it should not have. Microsoft often points to network drivers. Update the driver named on the screen.
PAGE_FAULT_IN_NONPAGED_AREA. Windows reached for memory that was not there. Update or disable the named driver, then check the disk.
KMODE_EXCEPTION_NOT_HANDLED. A driver hit an error it could not handle. Remove or disable drivers you added recently.
DPC_WATCHDOG_VIOLATION. A driver took too long to finish its work. Microsoft says to find and update that driver, and to check new hardware for compatibility.
VIDEO_TDR_TIMEOUT_DETECTED. The display driver stopped answering. Get a new driver from your graphics card maker.
NTFS_FILE_SYSTEM. Often a damaged file system or bad spots on the drive. Run a disk check and the drive maker's test.

If you missed the code, Windows logs it. Search for Event Viewer, open Windows Logs, then System, and look for errors at the time of the crash.

How to Fix a Computer That Keeps Blue Screening

Work through these in order. Stop when the crashes stop.

Undo What Changed Last

Think about what happened right before the crashes started. Microsoft's first step is to shut down, remove any hardware you added, and restart. The same logic applies to a new driver, a new antivirus or a new app. If the crashes began the day you installed something, that is your top suspect.

Start in Safe Mode if Windows Keeps Crashing

If the computer crashes before you can do anything, start it in safe mode. Safe mode loads only the basic drivers, so a bad one cannot load and crash the system.

Microsoft's steps go through recovery. On Windows 11, open Settings, then System, then Recovery. On Windows 10, it is Settings, then Update & Security, then Recovery. Under Advanced startup, pick Restart now. Then choose Troubleshoot, Advanced options, Startup Settings and Restart. Press 4 for safe mode, or 5 for safe mode with networking. If Windows will not start at all, it should open these recovery screens on its own after a few failed starts.

Update or Roll Back the Driver

Right-click Start and open Device Manager. Look for any device with a yellow exclamation point. Right-click it and pick Update driver. If that does not help, Microsoft says to disable or uninstall the device.

If the crashes started right after a driver update, roll it back instead. Right-click the device, open Properties, then the Driver tab, and pick Roll Back Driver if it is offered. For graphics cards, get the driver from the card maker's site, not a random download page.

Install Windows Updates

Microsoft's own fixes for known crashes come through Windows Update. On Windows 11, open Settings, then Windows Update, then Check for updates. On Windows 10, it is Settings, then Update & Security, then Windows Update.

Free Up Disk Space

Microsoft recommends keeping 10 to 15 percent of your drive free. A drive that is packed full leaves Windows no room for updates or the files it writes during a crash. Our guide to why your computer is so slow walks through clearing space safely.

Repair Windows System Files

Damaged system files can cause crashes too. Microsoft's support page gives the order. Search for cmd, right-click Command Prompt and pick Run as administrator. Type DISM.exe /Online /Cleanup-image /Restorehealth and press Enter. Microsoft says this can take several minutes. Then type sfc /scannow and press Enter. Leave the window open until it reaches 100 percent.

Use System Restore

If you have a restore point from before the crashes, use it. It rolls back drivers and system settings to that date. Microsoft lists this as the last of its basic steps.

When It Really Is Hardware

If the steps above did not stop the crashes, or the stop code changes every time, look at the hardware. Random codes are a classic sign of a hardware fault, because the bad part trips up whatever happens to be running.

Memory. Run Windows Memory Diagnostic. HP's guide lists it as a standard step. Search for it in the Start menu, restart when asked and let the test run.
The drive. Microsoft points to disk errors behind file system crashes. Run a disk check and the test tool from your drive's maker.
Heat. HP's guide lists overheating as a cause. A laptop vent full of dust or a dead fan can crash a computer under load. Clean the vents and watch for crashes during games or video calls.
Power. On a desktop, HP's guide also lists a failing power supply. Crashes under heavy load with no clear driver are a hint.
Overclocking. If you or a shop pushed the processor or memory past stock speed, set it back to default.

Back up your files now if you suspect hardware. A failing drive can get worse fast. Our guide to backing up photos and files covers the easy ways to do it.

For the Curious, Read the Crash Files

Windows saves a small crash file each time. Microsoft's guide says small memory dump files go in the Minidump folder inside your Windows folder, and larger ones are saved as MEMORY.DMP in the Windows folder itself.

Microsoft's own tool for reading them is WinDbg, part of its free debugging tools. Open the dump file and run the analyze command, and it names the driver or module that crashed. It is a tool for tech support folks, but the driver name it gives you is often all you need.

Microsoft also has a stress test called Driver Verifier for crashes nobody can trace. It warns that the tool can slow the computer down a lot and cause more crashes while it runs. Leave it to a repair shop unless you know what you are doing.

How Windows 11 Now Fixes Some Crashes for You

When one bad update hits millions of computers at once, Windows can now fix itself. This came after the CrowdStrike outage in July 2024. Microsoft said a faulty CrowdStrike security update hit about 8.5 million Windows devices, or less than 1 percent of all Windows machines. Many of them were stuck in crash loops that each needed a hand fix.

The answer is a feature called quick machine recovery. Microsoft says it is available on Windows 11 version 24H2, build 26100.4700 or later. When a computer fails to start over and over, it boots into the recovery screens, connects to the internet and checks Windows Update for a fix. Microsoft says it is on by default for Windows Home and for Pro computers that are not managed by a company. You can check it under Settings, then System, then Recovery.

Microsoft calls it a best effort feature. It is built for widespread problems, not the one bad driver on your laptop. So you still need the steps above.

When to Get Help or Replace the Computer

Call a repair shop if Windows will not start even in safe mode, if the memory test finds errors, or if the drive test fails. Those are parts problems, and a part swap is often cheaper than a new computer.

If the computer is old and needs a new drive, new memory and still runs slowly, it may be time to replace it. Whatever you decide, get your files off first.

The Bottom Line

A computer that keeps blue screening is almost always telling you something specific. Write down the stop code, undo what changed last, update or roll back drivers, install updates and repair system files. Microsoft's own data says drivers cause about 70 percent of crashes, so start there. Test the memory, the drive and heat only after that. And on newer Windows 11 computers, that blue screen may now be black.

Keep Reading

Windows changes how it handles crashes with almost every big update. Follow the latest in our devices news, or browse more plain tech advice.

Questions Readers Ask

Why does my computer keep getting a blue screen?

Windows shows a blue screen when it hits an error it cannot safely recover from, so it stops to protect your files. Microsoft's own crash analysis says about 70 percent of these come from third party driver code, about 10 percent from hardware, about 5 percent from Microsoft code, and the rest cannot be traced. A crash that keeps coming back usually means one driver or one part is still bad.

How do I fix a blue screen on my computer?

Write down the stop code first. Then remove any hardware you just added, install Windows updates, update or roll back the driver named on the screen, and keep 10 to 15 percent of your drive free. If Windows will not start, use safe mode. Run DISM and then sfc /scannow from an admin Command Prompt to repair system files.

Is blue screen caused by RAM?

It can be. Bad or loose memory is one of the hardware causes, and stop codes like MEMORY_MANAGEMENT or PAGE_FAULT_IN_NONPAGED_AREA can point to it. But Microsoft's data says hardware of any kind is behind only about 10 percent of crashes, so check drivers first. Run Windows Memory Diagnostic to test the RAM.

Why does my PC randomly blue screen and restart?

Windows restarts on its own after a stop error by default. Random crashes with different stop codes often point to hardware such as memory, heat or the power supply. The same stop code every time usually points to one driver. Check the System log in Event Viewer and the minidump files to see what crashed.

Can a blue screen damage my computer?

The blue screen itself does not damage anything. It is Windows shutting down to stop damage. The risk is lost work from the crash and whatever is causing it, such as a failing drive. Back up your files if crashes keep happening.

Why is my blue screen black now?

Microsoft redesigned the crash screen in Windows 11 version 24H2. It is now black, drops the sad face and QR code, and shows the stop code and the driver at fault. Help Net Security reported the rollout on July 23, 2025. It is the same kind of error with a new look.

Will resetting Windows fix a blue screen?

Sometimes, if the cause is software or a bad driver. It will not fix bad RAM, a failing drive or overheating, and the crash will come back. Try the steps in this guide first, and back up your files before any reset.