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📖 What is Deployment Image Servicing and Management (DISM)?

Deployment Image Servicing and Management (DISM) is a command-line tool used to repair, prepare, and service Windows images. It is often used when SFC cannot fix a corruption because it can repair the local system image using Windows Update as a source.

🥋 Sensei Says:

"If SFC fails to fix the corruption, DISM is your next step. It repairs the underlying image that SFC uses for its repairs."

📚 Certification: CompTIA A+ Certification Exam Core 2 (220-1102)

🔑 What are the Key Concepts of Deployment Image Servicing and Management (DISM)?

▸ DISM serves as the repair mechanism for the Windows Component Store, which is the source folder SFC uses to replace corrupted system files.
▸ The /Online switch is critical for technicians to specify that the tool should perform operations on the operating system currently running.
▸ The /Cleanup-Image command combined with /RestoreHealth is the primary sequence used to scan for and automatically repair system image corruption.
▸ DISM can utilize Windows Update as a remote source to download healthy files when the local recovery image is itself corrupted.
▸ Beyond repair, DISM is used by administrators to mount, modify, and service offline Windows images (.wim files) before deployment to devices.

🎯 How does Deployment Image Servicing and Management (DISM) appear on the 220-1102 Exam?

You may be asked to identify the correct tool to use after running 'sfc /scannow' and receiving a message stating that Windows Resource Protection found corrupt files but was unable to fix some of them.

A scenario might describe a technician troubleshooting a system with recurring OS instability where standard file checks fail, requiring a tool that can repair the underlying system image via Windows Update.

❓ Frequently Asked Questions

Why must I run DISM before running SFC again?

SFC relies on the local system image to replace bad files. If that image is corrupted, SFC will fail. DISM repairs the image first, providing SFC with a healthy source for its repairs.

Can DISM be used without an internet connection?

Yes, while it defaults to Windows Update, you can use the /Source switch to point DISM toward a known-good Windows installation media or a mounted .wim file for offline repairs.

Related Terms from CompTIA A+ Certification Exam Core 2

Incremental Backup S.M.A.R.T. (Self-Monitoring, Analysis, and Reporting Technology) PCIe (Peripheral Component Interconnect Express) Registry Editor (regedit) Thermal Paste RAID

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