Error 87 often appears when pointing DISM to an install.wim file. The wrong format:
DISM /Online /Cleanup-Image /RestoreHealth /source:WIM:D:\sources\install.wim Error: 87 Diagnosis: Copy-pasted from a forum missing the image index. Fix: Added :1 to the end of the WIM path. dism error 87 fixed
Follow these solutions in order. They move from the most common formatting fixes to deeper system service resets. Fix 1: Add Proper Spacing (The Most Common Solution) Error 87 often appears when pointing DISM to an install
Before we fix it, we must understand it. In the context of DISM, translates to: "The parameter is incorrect." dism error 87 fixed
Follow these troubleshooting steps in order to resolve the error. 1. Check Your Spacing (The Most Common Fix)