Windows Installer was unable to complete the installation task.
The installation is in progress and is then canceled or rolled back.
Check the installation log for steps immediately before failure and which version is already installed.
If it is checked and resolved from above, you do not need to proceed to the next step.
The installation is in progress and is then canceled or rolled back.
Difficulty Easy · Estimated time 5 minutes
Check points: Record the error code, when it occurred, and any recent changes.
Windows Installer was unable to complete the installation task.
Difficulty Moderate · Estimated time 10~30 minutes
Check points: Check that the installation is complete and that the program is running.
If you are experiencing “game crashing” symptoms, possible causes include game file or driver issues, overlays, or background app conflicts. Check error messages, game files, graphics drivers, overlays and hardware stability in that order.
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.
Content review date: 2026-10-07