Windows PC Error Messages Explained

Your PC Ran Into a Problem and Needs to Restart

Your Windows computer had a serious error and needs to restart. The "blue screen" looks scary but usually fixes itself after restarting.

Windows Security — Threats Found

Windows detected a potentially harmful file or program on your computer. This is your computer protecting you — it has already quarantined the threat.

Your PC Did Not Start Correctly

Windows could not start up normally and has entered recovery mode. Your files are most likely still safe.

Windows Update Failed — Error Installing Updates

Windows tried to install an update but something went wrong. Your computer is still working fine — the update just did not install.

Not Enough Disk Space

Your computer is running out of room to save files and programs. You need to delete some things you no longer need.

DLL File Is Missing

A file that a program needs to run is missing from your computer. Think of it like a missing ingredient in a recipe — the program cannot work without it.

No Internet — Connected But No Internet Access

Your computer is connected to your Wi-Fi network but cannot actually reach the internet.

No Wi-Fi Networks Found

Your computer cannot see any Wi-Fi networks to connect to. The Wi-Fi adapter might be turned off or having a problem.

Your Computer Is Low on Memory

Your computer is running out of working memory (RAM). Too many programs are open at once and the computer is struggling to keep up.

Screen Flickering or Flashing

Your computer screen is flickering or flashing. This is usually caused by an incompatible app or display driver.

Microphone Not Detected

Your computer cannot find or use your microphone. You will not be able to make voice or video calls until this is fixed.

Taskbar Not Responding

The bar at the bottom of your screen that shows your open programs and the clock has frozen. You can usually fix this with a restart.

We Can't Find Your Camera

Your computer cannot detect or use your camera. This may be a privacy setting or a driver issue.

Bluetooth Not Available

Your computer's Bluetooth is not working. You will not be able to connect wireless headphones, speakers, mice, or keyboards.

Clock Is Wrong / Time Not Syncing

Your computer's clock is showing the wrong time. This can cause problems with websites, email, and other services.

Application Not Responding

A program on your computer has frozen and is not responding to your clicks. The rest of your computer is usually fine.

Printer Not Found

Your computer cannot find or connect to your printer. The printer might be off, disconnected, or not set up correctly.

USB Device Not Recognized

Something you plugged into a USB port on your computer is not being detected. The computer does not know what the device is.

Access Denied — You Don't Have Permission

Windows is blocking you from opening a file, folder, or program. This is a security feature — your account may not have the right permissions.

Windows Takes a Long Time to Start Up

Your computer is taking much longer than normal to start up and be ready to use. Too many programs are trying to start at once.

No Audio Output Device Installed

Your computer cannot play sound because it cannot find speakers or headphones. The audio driver or connection may have a problem.

File Explorer Not Responding

The program you use to browse your files and folders has frozen. Your files are safe — the program just needs to be restarted.

Windows Hello — Couldn't Recognize You

Windows Hello face recognition or fingerprint login could not verify your identity. You can still log in with your PIN or password.