How To Fix Error 87 Dism Windows 7 ★

Microsoft backported some DISM features to Windows 7 via an update (KB2966583), but the version shipped with Windows 7 natively does support the commands you see in modern Windows 10 guides.

Unlike error 0x800f081f (missing source files) or error 2 (file not found), Error 87 simply states: "The parameter is incorrect." how to fix error 87 dism windows 7

If you need modern DISM features (like /RestoreHealth with Windows Update), you must update the tool via KB2966583. Otherwise, stick to the legacy tool—it is slow, but it works on 100% of Windows 7 machines, regardless of update status. Microsoft backported some DISM features to Windows 7

If so, move to Fix 2. Fix 2: Update Your Windows 7 DISM Tool (The "KB2966583" Fix) If you receive Error 87 even when using the /Source parameter, your DISM binary is too old to understand the /RestoreHealth argument at all. If so, move to Fix 2