How to fix the Code 21 (SOLVED)
Your PC is currently running: ...
- Error name: Code 21
- Applies to: Windows 10, 11, 8, 7, Vista, XP
- Code 21 is appearing and starting to break a window of the active program;
- Code 21 appears on the screen;
- The message 'A problem has been detected, and Windows has been shut down to prevent damage to your computer. The problem seems to be caused by the following file...';
- The user's computer stops working, showing a Code 21 error while starting the program;
- Windows is functioning poorly, responding slowly to commands;
- The user's PC hangs frequently
Code 21 error messages can appear due to a clogged Windows registry and erroneous entries of non-existent programs because the user usually removes software incorrectly. Other common causes are incorrect data entry, missing files that were accidentally deleted from the registry, causing problems with the system.
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