Dism Error 87 Fixed

Some DISM options are not available in older Windows versions (e.g., Windows 7). For example, /RestoreHealth works on Windows 8 and later. On Windows 7, you need to use the System Update Readiness Tool instead.

DISM Error 87 ("The parameter is incorrect") commonly occurs when running the Deployment Image Servicing and Management (DISM) tool on Windows. This report explains causes, diagnostics, and a comprehensive set of solutions, including step-by-step commands, troubleshooting flowcharts, and preventive measures. Target audience: system administrators and advanced users troubleshooting Windows image servicing failures on Windows 7 through Windows 11. dism error 87 fixed

DISM /?

This lists all valid commands for your Windows version. Compare with what you typed. Some DISM options are not available in older

Rarely, the DISM module itself is damaged. Run: This lists all valid commands for your Windows version

dism /online /cleanup-image /revertpendingactions

Then reboot and retry the original command.