Error 87 Fixed — Dism

DISM \Online \Cleanup-Image Right: DISM /Online: /Cleanup-Image

When you type a DISM command (for example, to check health or restore health), the tool parses every space, slash, and colon. is the DISM equivalent of "I don’t understand what you just typed." It indicates that the syntax is incorrect, a parameter is misspelled, or a colon is missing. dism error 87 fixed

Missing colon after Online .

DISM /Online: /? DISM /Image: /? DISM /Cleanup-Image /? If a particular switch doesn’t appear in the help list, it doesn’t exist in your version of Windows (e.g., some switches are only for Windows PE). If your path contains spaces or unusual characters, wrap the path in double quotes and escape spaces properly. DISM /Online: /

Typically displayed in the Command Prompt as Error: 87 – The option is unknown , this error halts your repair efforts immediately. While the message sounds vague, it is actually a very specific syntax error. The good news? It is almost always fixable within minutes. If a particular switch doesn’t appear in the

DISM /Online /Cleanup-Image /RestoreHealth Result: Error: 87 – The option is unknown.