The darkening of the computer desktop is usually caused by wallpaper settings, corruption of cache, high resource usage or abnormal system files. First, check whether the background in the "Personalization" setting is "solid color" or "black", try to change the wallpaper; second, clear the wallpaper cache, delete the TranscodedWallpaper.jpg file and reset the wallpaper; then check the task manager to confirm whether the system resources are overloaded, and restart the resource manager or adjust the performance options if necessary; finally run the sfc /scannow command to scan and repair the system files. In most cases, the above steps can be used to solve the problem.

The computer desktop suddenly turned pure black, which is really annoying. This situation is not uncommon in Windows systems, which may be due to excessive system settings, resource usage, or problems with wallpaper files. Don't worry, it can be solved most of the time.

Check whether the wallpaper settings are normal

Many people's first reaction when they encounter black screen is that "the system is broken". In fact, first check whether there are any problems with the basic settings:

• Open Settings → Personalization → Background
• Confirm that the background option is not "Solid Color" or "Black"
• If you set the picture as wallpaper, try changing the picture to see

Sometimes the wallpaper settings will be reset after the system is updated, or the wallpaper file may not be displayed because it is accidentally deleted or damaged.

Clear wallpaper cache (for Windows 10/11)

Windows will cache wallpaper pictures. If the cache is damaged, the wallpaper may fail to load:

1. Open File Explorer
2. Enter C:\Users\你的用戶(hù)名\AppData\Roaming\Microsoft\Windows\Themes
3. Find the file named TranscodedWallpaper.jpg and delete it (recommended to back it up first)
4. Go back to the "Personalization" setting and reselect wallpaper

This operation will not affect system stability, but it can force the system to rebuild the wallpaper cache.

Check system resources and performance settings

If you open many programs at the same time, especially software with high graphics card load (such as games and video clips), the system may temporarily turn off wallpaper to save resources:

• Right-click on the taskbar → “Task Manager”
• Check whether the CPU, memory, and GPU usage is close to full load
• If so, try restarting Explorer:
  • Find "Windows Explorer" in Task Manager
  • Right-click → “Restart”

In addition, you can also go to "Settings" → "System" → "About" → "Advanced System Settings" → "Performance Options" to confirm that "Show icons on desktop instead of images" is not checked.

System files are corrupt? Run SFC Scan

If none of the above methods work, the system file may be corrupted:

• Open a command prompt (administrator permissions)
• Enter sfc /scannow and enter
• Wait for the scan to complete, the system will automatically fix the discovered problems

This process may take several minutes, and after completion, restart the computer to see if there is any improvement.

Basically, these common causes and corresponding solutions are all about them. In most cases, you can do it by changing a wallpaper or cleaning the cache, but don't ignore the possibility of system abnormalities. Small details that are not complicated but are easy to ignore are often the key.

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