Windows System Tools
Download nowSystem tools repair Windows itself: protected system files, the component store, the servicing stack and the installer. Use them in the right order and most “reinstall Windows” advice becomes unnecessary.
Updated August 9, 2026 · PC Utility Hub Editorial Team
The correct repair order
- 1DISM /Online /Cleanup-Image /CheckHealth for a quick verdict.
- 2DISM /Online /Cleanup-Image /RestoreHealth to repair the source of system files.
- 3sfc /scannow to replace damaged protected files from a healthy store.
- 4Reboot and re-run sfc /scannow to confirm no violations remain.
Running SFC before DISM often fails, because SFC repairs from the same component store that may be damaged.
When repair is not the answer
If DISM cannot repair the image even with an install.wim source, an in-place upgrade using current installation media rebuilds Windows while keeping files and most applications. That is usually faster and safer than chasing individual errors.
In this section
System File Checker
Built-in Windows tool for scanning and repairing corrupted system files via sfc /scannow.
DISM
Command-line tool to check and repair the Windows component store, complementing SFC.
Windows Installer Cleanup Utility
MSICUU2 is discontinued; use Microsoft's supported troubleshooters and manual registry cleanup instead.
Related pages
- System File CheckerBuilt-in Windows tool for scanning and repairing corrupted system files via sfc /scannow.
- DISMCommand-line tool to check and repair the Windows component store, complementing SFC.
- SFC vs DISMComparison of System File Checker and DISM, what each repairs, and the recommended run order.
- Windows Repair ToolsOverview of current Windows repair tools and what replaced the discontinued Microsoft Fix It utility.
- CHKDSKOverview of the chkdsk utility, its switches, and how it fits into Windows disk maintenance.