DISM /English /?
If you are on Windows 7 and need a full repair, you must use the CheckHealth option with a source media (a Windows 7 DVD).
The "complete story" of DISM Error 87 is almost always a tale of a tiny typo. This error code specifically means " The parameter is incorrect
, accompanied by the message: "The parameter is incorrect." This error typically stems from syntax mistakes, incorrect formatting, or executing commands in an improper environment. Resolving it is a straightforward process of refining command structure and ensuring the system is ready for repair. 1. Correcting Command Syntax and Spacing dism error 87 fixed
If you have verified your syntax 100% and still get Error 87, the error might be lying. Sometimes, a deeply corrupted Component Store (C:\Windows\WinSxS) can cause DISM to misinterpret commands.
PowerShell uses cmdlets (with dashes) rather than forward slash parameters. If your error was related to CMD’s parsing of slashes, PowerShell bypasses the issue entirely.
If you are trying to repair your Windows system image using the Deployment Image Servicing and Management (DISM) tool, seeing can be frustrating. The error message usually reads: DISM /English /
DISM Error 87 is almost never a serious system problem—it’s a "syntax error" for command-line tools. Double-check your spelling, spacing, and slashes, and you’ll likely resolve it in under a minute.
When Windows Update is not available or fails, you can point DISM to a local source for repair files, such as a Windows installation ISO or USB drive.
Run a lower-level health check first.
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| Purpose | Command | |--------|---------| | Check health | DISM /Online /Cleanup-Image /CheckHealth | | Scan only | DISM /Online /Cleanup-Image /ScanHealth | | Restore health (default) | DISM /Online /Cleanup-Image /RestoreHealth | | Use custom source | DISM /Online /Cleanup-Image /RestoreHealth /Source:E:\sources\install.wim |