DISM \Online \Cleanup-Image Right: DISM /Online: /Cleanup-Image
DISM /Online /Cleanup-Image /RestoreHealth Result: Error: 87 – The option is unknown. dism error 87 fixed
Open CMD as Administrator. Step 2: Type DISM /? and press Enter. This shows the full help menu. Step 3: To see syntax for specific operations, use: and press Enter
Let’s fix it. In 90% of cases, Error 87 is caused by a missing colon after Online . Many old tutorials omit the colon, but modern Windows versions require it strictly. In 90% of cases, Error 87 is caused
DISM /Online /Cleanup-Image /RestoreHealth
Now that you know how to fix DISM Error 87, you can return to repairing your Windows image and keeping your PC healthy. Do you have a specific DISM command that still triggers Error 87? Check the official Microsoft documentation for DISM syntax or leave a comment below for a tailored fix.