Fixed | Dism Error 87
A broken update service preventing online image repairs. How to Fix DISM Error 87
The most frequent cause is missing spaces before the forward slashes ( / ). Windows Command Prompt is very strict about this. ❌ DISM/Online/Cleanup-Image/RestoreHealth ✅ Correct: DISM /Online /Cleanup-Image /RestoreHealth
If your source path has spaces, enclose it in quotes:
: DISM.exe /Online /Cleanup-image/Restorehealth (Missing a space before /Restorehealth ) Correct : DISM.exe /Online /Cleanup-image /Restorehealth How to run it correctly: Press the Windows Key . Type cmd . Right-click Command Prompt and select Run as administrator . Carefully type or copy-paste the exact string below: DISM.exe /Online /Cleanup-image /Restorehealth Use code with caution. Press Enter . 2. Run the SFC Tool First dism error 87 fixed
“Error: 87, The parameter is incorrect.”
Let's move on to the practical fixes. Follow these steps in order, as the first solution resolves the issue for the vast majority of users.
Let me outline: H1 title, intro, causes, fix 1 (syntax check), fix 2 (run as admin), fix 3 (correct paths), fix 4 (offline image fixes), fix 5 (image cleanup), alternative methods, FAQ, conclusion. Write naturally, like a tech expert explaining to a colleague. Start writing now. is a comprehensive, long-form article designed to rank for the keyword It covers the causes, solutions, and preventative measures for this common Windows command-line error. A broken update service preventing online image repairs
Press , type C:\Windows\SoftwareDistribution , and press Enter . Select all files inside this folder and Delete them. Return to the Command Prompt and restart the services: net start wuauserv net start bits Use code with caution. Run your DISM tool again. If you want to troubleshoot further, tell me:
If you have verified your syntax 100% and still get Error 87, the error might be lying. Sometimes, a deeply corrupted Component Store (C:\Windows\WinSxS) can cause DISM to misinterpret commands.
If this fails with Error 87, your DISM is too old. Carefully type or copy-paste the exact string below: DISM
DISM.exe /Online /Cleanup-image /Restorehealth (Missing spaces before the slashes)
DISM /Online /Cleanup-Image /RestoreHealth /Source:D:\sources\install.wim /LimitAccess
