How To Fix Invalid MS-DOS Function While Copying Or Deleting Files
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1How To Fix Invalid MS-DOS Function While Copying Or Deleting Files
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In this tutorial, I’ll show you how to fix the "Invalid MS-DOS function" error that can occur when copying or deleting files on Windows.
Name of D-Word Value: CopyFileBufferedSynchronousIo
NOTE: “I” as in Ivan, Not Lima
Issues addressed in this tutorial:
Fixing the "Invalid MS-DOS function" error
Solutions for file corruption issues
Troubleshooting file deletion and copy errors
Using Command Prompt to resolve file system errors
Checking for disk errors and permissions
This works on Windows 11, Windows 10, and Windows 7 for PCs, desktops, and laptops.