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reserved names
About this tag
The reserved names tag on WindowsForum.com covers issues related to Windows file system limitations, specifically file or folder names that Windows reserves for legacy device purposes, such as AUX, CON, NUL, and PRN. Discussions include troubleshooting when users encounter errors trying to create, rename, or delete files with these names, and methods to force delete stubborn files on Windows 10 and 11. The tag also explores why Windows does not automatically warn users about these reserved names and the frustration this causes. Content focuses on practical solutions and explanations for both casual and advanced users dealing with these system-level restrictions.
When Windows refuses to remove a file, the frustration is immediate — but the reasons are usually diagnosable and fixable. This in-depth guide walks through every practical method to force delete a file that won't delete on Windows 10 and Windows 11, explains why files become stubborn in the...
chkdsk
command line
external drive
file in use
force delete
icacls
long path
malware
ntfs permissions
ownership
process explorer
reservednames
safe mode
takeown
third-party tools
trustedinstaller
windows 10
windows 11
winre
People at various times run into mysterious problems that have no apparent source but are eventually found out to be caused by the innocent use of a file named "aux.txt" or any one of the other reserved file names. It isn't realistic to expect that all users of such an ubiquitous system as...