| 0x00000004 | Apple macOS Error Code 0x00000004: How to Fix It | medium |
| 0x0000019A | Microsoft Windows Error Code 0x0000019A: How to Fix It | medium |
| 0x00000159 | Microsoft Windows Error Code 0x00000159: How to Fix It | medium |
| 0x0000013A | Microsoft Windows Error Code 0x0000013A: How to Fix It | medium |
| 0x00000124 | Microsoft Windows Error Code 0x00000124: How to Fix It | hard |
| 0x0000005C | Microsoft Windows Error Code 0x0000005C: How to Fix It | medium |
| 0x00000039 | Microsoft Windows Error Code 0x00000039: How to Fix It | medium |
| 0x00000024 | Microsoft Windows Error Code 0x00000024: How to Fix It | medium |