Windows Errors

Page fault in nonpaged area means Windows could not find data that should be in memory, usually faulty RAM, a bad driver, or disk errors. Here is how to fix it.

Mouse lag on Windows 11 is usually from a bad driver, wireless interference, power saving, or a pointer setting. Here is how to check and fix it.

Svchost using lots of memory is usually Windows Update, SysMain, or a hosted service doing work, and sometimes a leak or malware. Here is how to check and fix it.

Driver power state failure means a driver mishandled a sleep or wake transition, usually graphics, network, or chipset drivers. Here is how to fix it.

A PC that freezes on startup is usually caused by a bad driver, corrupt system files, too many startup apps, or a failing drive. Here is how to check and fix it.

WHEA uncorrectable error means Windows detected a fatal hardware fault it could not fix, often CPU, RAM, power, overclocking, or heat related. Here is how to check.

A second monitor not detected is usually a loose cable, wrong input, outdated graphics driver, or a disabled display. Here is how to check and fix it.

DPC watchdog violation means a driver or process ran too long, often an outdated SSD firmware or SATA controller driver. Here is how to check and fix the error.

The Start menu not working on Windows is usually caused by corrupt system files, a broken update, or a damaged user profile. Here is how to fix and restart it.

Windows Explorer keeps crashing usually from corrupt system files, a bad shell extension, outdated graphics drivers, or damaged files. Here is how to fix it.

Bad system config info means Windows found corrupt registry or boot configuration data, sometimes bad drivers or RAM. Here is how to check and fix the error.

A laptop overheats and shuts down usually from blocked vents, dust, dried thermal paste, or heavy load. It shuts off to protect the CPU. Here is how to fix it.

System service exception means a system process hit an illegal operation, usually from a faulty driver, corrupt files, or third-party software. Here is the fix.

Windows says your device is missing important security fixes when recent updates have not installed, often because updates are paused, failing, or the PC is old.

Critical process died means a process Windows needs to run stopped unexpectedly, usually from corrupt system files, bad drivers, or malware. Here is the fix.

CPU usage at 100 percent usually means a background process, Windows Update, malware, or a driver is overloading the processor. Here is how to check and fix it.

Inaccessible boot device means Windows could not read the drive holding the operating system at startup, often a storage driver, BIOS mode, or failing disk.

A PC keeps blue screening usually from faulty drivers, failing RAM, disk errors, overheating, or corrupt system files. Here is how to find and fix the cause.

Your computer waking by itself is usually from wake timers, scheduled tasks, or a device like the mouse or network card. Here is how to find and stop the cause.

Windows freezing randomly is usually caused by drivers, overheating, failing RAM or disk, or corrupt system files. Here is how to find the cause and stop it.

A Kernel-Power error (Event 41) means your PC rebooted without shutting down cleanly, usually from power, heat, or driver issues. Here is how to track it down.

High memory usage with nothing open is usually background apps, browser processes, or normal Windows caching. Here is what is using RAM and how to check it.

Task Manager showing 100% disk usage usually means indexing, SysMain, updates, or a failing drive are maxing it out. Here is how to find the cause and fix it.

Device not migrated means a device's settings did not transfer during a Windows update, usually a driver mismatch. Here is what it means and how to fix it.

Windows Update keeps failing usually from corrupt update files, low disk space, or a stuck service. Here is how to reset the components and install updates.

Driver Power State Failure (0x0000009F) on Windows 10 means a driver did not respond during sleep or wake. Learn the causes and how to fix the blue screen.

Getting Windows Ready, Don't turn off your computer usually means updates are installing. Learn how long to wait and how to fix it if it is truly stuck.

Error 0xc000000f on startup means Windows cannot read the Boot Configuration Data needed to start. Learn the causes and how to repair the boot files.

System Thread Exception Not Handled means a driver caused an error Windows could not manage. Learn the causes and how to fix this blue screen step by step.

A laptop that boots to a black screen with just a cursor usually means the desktop shell or display driver failed to load. Learn the causes and fixes.

To disable driver signature enforcement in Windows 11, use Advanced Startup and press 7, or use bcdedit. Learn both methods and the security tradeoffs.

Fix a corrupt Windows registry without reinstalling using System Restore, SFC, DISM, and Startup Repair. Learn the safe steps and what causes registry damage.

INACCESSIBLE_BOOT_DEVICE means Windows 11 cannot read the drive holding its system files at startup. Learn the real causes and how to fix this blue screen.

Critical Process Died (0x000000EF) means a system-critical Windows process stopped. Here are the real causes and step-by-step fixes for the blue screen.

A laptop stuck on Preparing Automatic Repair every boot usually means damaged system or boot files. Learn the causes and how to break the repair loop.

Kernel Security Check Failure (0x00000139) means Windows found corrupted data or memory during a safety check. Learn the real causes and how to fix it.

A Windows Update stuck at 100 percent is usually still installing in the background. Learn when it's truly stuck and how to fix a frozen Windows Update.

Your PC ran into a problem is the blue screen (BSOD) error. Learn what the stop code means, why it happens, and how to fix your PC and stop crashes.

A laptop touchpad that stops working is usually disabled by a key or setting. Learn why the touchpad stops and how to re enable it and fix the driver.

A laptop that turns on but stays black is usually running without sending video to the screen. Learn the common causes and how to fix a black laptop screen.

Automatic Repair couldn't repair your PC means Windows failed to fix a startup error. Learn what causes it and how to repair your PC and boot again.

Windows 11 can feel slower than Windows 10 due to heavier background tasks, animations, and security features. See why, and how to speed Windows 11 up.

A PC that keeps waking from sleep is being triggered by a device or scheduled task. Learn how to find what wakes your PC and stop it from waking.

A required device isn't connected means Windows can't reach its boot drive or files. Learn what the error and codes mean and how to fix your PC.

If your laptop keyboard types numbers instead of letters, Num Lock is on for the embedded number pad. Learn how to turn Num Lock off and fix it fast.

Windows Search not working is usually a stalled service or a corrupt index. Learn why Windows Search stops and how to fix search and rebuild the index.

A taskbar that keeps freezing means Windows Explorer has hung. Learn why the taskbar freezes and how to restart Explorer and stop it happening again.

Reboot and select proper boot device means the PC can't find a drive to start Windows. Learn the causes and how to fix boot order and boot errors.

Plugged in, not charging means your laptop runs on AC but the battery isn't charging. Learn the causes, from charge limits to drivers, and how to fix it.

If your PC makes sound but has no display, it powers on without sending video. Learn the causes, beep codes, and how to fix a PC with no display.

Preparing Automatic Repair means Windows detected a startup problem and is scanning to diagnose it. Learn why it happens and how to fix an Automatic Repair loop.

Your computer restarts by itself usually from automatic restart after a crash, overheating, Windows updates, or failing hardware. Learn how to find and fix the cause.

No Internet, secured means your laptop reached the Wi-Fi router but cannot get online, usually an IP, DNS, or driver issue. Here is how to fix it step by step.