The source required to repair Windows components or install features was not found.
Appears during .NET Framework activation or DISM repair.
Check the Windows version/build you are using and the name of the failed feature.
If it is checked and resolved from above, you do not need to proceed to the next step.
Appears during .NET Framework activation or DISM repair.
Difficulty Easy · Estimated time 5 minutes
Check points: Record the error code, when it occurred, and any recent changes.
The source required to repair Windows components or install features was not found.
Difficulty Moderate · Estimated time 10~30 minutes
Check points: Check the recovery log to see if the missing source error has disappeared.
If “computer slows down” repeatedly, it is better to narrow it down to excessive background processes and insufficient storage space rather than changing several settings at once. First look for CPU, memory, and disk bottlenecks in Task Manager and check startup programs, storage space, and temperature.
Among boot problems, the “powers on but does not boot” symptom may be related to boot file corruption or storage device issues. Distinguish between the POST stage and the Windows startup stage, then check in that order: external device, boot settings, and recovery environment.
Content review date: 2026-10-07