Sometimes, if the underlying Windows Update service is disabled or hung, DISM (which relies on it for source files) cannot complete the request. How to Fix DISM Error 87 1. Check Your Spacing (Most Likely Fix)
DISM /Online /Cleanup-Image /CheckHealth dism error 87 fixed
The most common cause of Error 87 is a simple typo—specifically, the omission of spaces before forward slashes. DISM commands are highly sensitive to formatting. For instance, the command dism/online/cleanup-image/restorehealth will trigger Error 87. Ensure there is a space before every character. The correct syntax should always look like this: dism /online /cleanup-image /restorehealth 2. Utilizing Elevated Permissions Sometimes, if the underlying Windows Update service is