Forum Discussion
Windows 11 system reports a parameter error when creating/opening text documents.
When creating or opening a text document in Windows 11, a parameter error is displayed. The default program for opening such files has been confirmed as Notepad, but running notepad.exe directly still results in an error.
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That kind of “parameter error” usually points to a corrupted Notepad installation or damaged system files rather than just a file association issue. A few things to try:
Go to Settings > Apps > Installed Apps, find Notepad, and choose Repair or Reset.
If that doesn’t help, uninstall and reinstall Notepad from the Microsoft Store.
Run sfc /scannow and DISM /Online /Cleanup-Image /RestoreHealth from an elevated Command Prompt to check for system file corruption.
Test creating/opening text files in another editor (like WordPad) to confirm if the issue is isolated to Notepad.
If Notepad continues to throw parameter errors after reinstall, it could point to deeper system corruption—at that point, an in-place repair of Windows 11 might be necessary.
