How to Fix Blue Screen Error in Windows (BSOD Guide)

The Blue Screen of Death (BSOD) — a full-screen blue error with a sad face and a stop code — is one of the most feared errors on Windows. It means your system encountered a critical error and had to restart. While it looks alarming, most BSODs can be fixed with systematic troubleshooting. This guide covers the most common stop codes and walks you through every fix, from simple driver updates to advanced system repair.

Common BSOD Stop Codes and What They Mean

Fix 1: Update or Roll Back Drivers

The most common cause of BSODs is a faulty driver — especially graphics, network, and chipset drivers:

1. Press Win + X → Device Manager
2. Look for devices with a yellow warning triangle
3. Right-click the device → Update driver → Search automatically
4. If the BSOD started after a driver update, right-click → Properties → Driver tab → Roll Back Driver
5. For GPU drivers, download the latest version directly from NVIDIA, AMD, or Intel's website

Fix 2: Run SFC and DISM (Repair System Files)

Corrupted system files can cause many BSOD stop codes. Run these commands in an elevated Command Prompt:

DISM downloads fresh copies of damaged system files from Windows Update. SFC then verifies and replaces any corrupted files. Always run DISM first, then SFC.

Fix 3: Run Windows Memory Diagnostic

Faulty RAM is a common cause of BSODs, especially PAGE_FAULT_IN_NONPAGED_AREA and KERNEL_DATA_INPAGE_ERROR:

1. Press Win + R, type mdsched.exe, press Enter
2. Click "Restart now and check for problems"
3. Windows will reboot and test your RAM (takes 10-20 minutes)
4. After restart, check results in Event Viewer → Windows Logs → System — look for "MemoryDiagnostics-Results"
5. If errors are found, you'll need to reseat or replace the faulty RAM stick

Fix 4: Check for Disk Errors

A failing hard drive or SSD can cause BSODs. Run a disk check:

The /f flag fixes errors; /r locates bad sectors and recovers readable data. If CHKDSK finds many bad sectors, your drive may be failing — back up your data immediately.

Fix 5: Uninstall Recent Updates or Software

If BSODs started after a Windows update or new software install:

1. Go to Settings → Windows Update → Update history → Uninstall updates
2. Find the most recent update and click Uninstall
3. For recently installed software: Settings → Apps → Installed apps, sort by date, and uninstall the suspect
4. If you can't boot normally, boot into Safe Mode (hold Shift + click Restart), then uninstall from there

Fix 6: Use System Restore

System Restore reverts Windows to a previous state without affecting your personal files:

1. Search for "Create a restore point" in the Start menu
2. Click System Restore
3. Select a restore point from before the BSODs started
4. Click Next → Finish and let Windows restore

Fix 7: Check for Overheating

Overheating CPUs and GPUs can cause BSODs, especially during gaming or heavy workloads:

• Download HWMonitor or Core Temp to check temperatures
• CPU should stay below 85°C under load; GPU below 90°C
• If overheating: clean dust from fans and vents with compressed air, ensure proper airflow around your PC, and check that thermal paste isn't dried out (reapply every 3-5 years)
• For laptops: use a cooling pad and make sure vents aren't blocked

Fix 8: Reset Windows (Last Resort)

If nothing else works, reset Windows while keeping your files:

1. Go to Settings → System → Recovery
2. Click Reset this PC
3. Choose "Keep my files" (reinstalls Windows but preserves personal data)
4. Select "Cloud download" for a fresh copy of Windows
5. Follow the prompts to complete the reset

Note: This will remove all installed programs and settings, but your documents, photos, and personal files in the Users folder are preserved.