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PDQ: DISM, SFC & CHKDSK: Fix Windows Issues Fast

PDQ
09/23/2026
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Windows isn't updating, things like that, maybe a system is crashing that you just like unexplained, run check disk, run DISM, and run SXSISM. What DISM does is it actually checks your Windows SXS folder, which is like a reserve copy of all of your system files. So it like basically keeps a copy of all of your system files. That way if one of your system files becomes corrupt, gets deleted, things like that, you have a source to go and repair from. But the thing that people usually recommend is running slash online slash cleanup image, and they usually go to straight slash restore health. Online, cleanup image, and then just check health. Here, this one says the component store is repairable. So at some point, some service, might've been Windows Update, might've been something else, flagged something in the component store as not right. And so it flagged it saying, hey, you should probably repair this. Now, the interesting thing is I ran into an issue where it was like, hey, it said it was fine, but then I actually did, no, it said it was bad, but then I actually did the scan, and it came back and said, oh no, everything's fine. So most people will usually just run slash restore health, and that is going to just, it's going to do your scan, and it's going to fix whatever it finds.

TL;DR

  • When Windows is crashing or failing to update, run CHKDSK, DISM, and SFC as a standard first-response troubleshooting sequence.
  • DISM checks and repairs the Windows SXS component store, which holds reserve copies of all system files for recovery purposes.
  • The recommended DISM command is `/Online /Cleanup-Image /RestoreHealth`, which scans and fixes issues automatically without requiring manual intervention.

Summary

This short clip walks through three essential Windows troubleshooting commands — CHKDSK, DISM, and SFC — recommended whenever a system is crashing unexpectedly, failing to update, or behaving erratically. The presenter focuses primarily on DISM, explaining that it targets the Windows SXS component store, which acts as a protected reserve copy of all system files. When a system file becomes corrupted or deleted, DISM can pull from this store to restore it. The recommended approach is running DISM with the `/Online /Cleanup-Image /RestoreHealth` flag, which performs a scan and automatically repairs any issues found. A live demonstration shows the `/CheckHealth` flag returning a 'component store is repairable' result, indicating that a prior service — possibly Windows Update — flagged something in the store as problematic. The presenter notes a quirk where a system reported corruption but then cleared itself after a full scan, reinforcing that running `/RestoreHealth` is the safest and most thorough option for most users.

Chapters

0:00 - When to Run These Tools
0:10 - How DISM Works
0:34 - Running DISM Commands
1:05 - RestoreHealth Best Practice

Key Quotes

0:10 "What DISM does is it actually checks your Windows SXS folder, which is like a reserve copy of all of your system files."
0:26 "If one of your system files becomes corrupt, gets deleted, things like that, you have a source to go and repair from."
1:17 "Most people will usually just run slash restore health, and that is going to just, it's going to do your scan, and it's going to fix whatever it finds."

FAQ

What is the difference between DISM /CheckHealth and /RestoreHealth?

CheckHealth quickly reports whether the component store has been flagged as corrupted or repairable, but does not fix anything. RestoreHealth performs a full scan and automatically repairs any issues it finds, making it the more thorough and recommended option.

When should I run DISM, SFC, and CHKDSK?

These tools are recommended whenever Windows is crashing unexpectedly, failing to update, or exhibiting unexplained behavior. Running all three covers disk integrity, system file corruption, and the component store in a single troubleshooting pass.


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  • Windows troubleshooting
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