Navigate to the following location in the Windows Registry: If your reading this you're probably at the point of trying to install a new WSUS server on Windows Server 2012 R2 and have received the message "Fatal Error: Illegal characters in path". Build. You may have created a partition specifically for the task, i.e. Start or search. Applies to: Certain characters have special meanings when used in file names in OneDrive, SharePoint, Windows and macOS, such as "*" for wildcards, and "\" in file name paths. Fix 2 – Fix Shell Folders Via Registry. Most filesystems are fairly permissive: for example, all NTFS, extN, btrfs, XFS and ReiserFS allow everything except 1) the null byte and 2) the slash /.. In particular, the Win32 0 API disallows * ? Your interest in Windows 10 is much appreciated. Many of these illegal characters are allowed for naming files and folders when using the Mac OS®, however, since the programming behind these systems is different. Illegal characters in path. For more information about file streams, see File Streams. Before Windows 95, Windows only allowed file names that were eight characters long, with a three character file extension–commonly known as an 8.3 filename. Exception Details: System.ArgumentException ... Back to Windows Forum Search our forums Search. Invalid characters. Illegal characters in path. For a Windows Form application the better solution for file and path names would be to use the SaveFileDialog control that does all path and file validation for you and will not allow the user to input invalid names or navigate to a directory they do not have permission for. The operating system may have its own restrictions. Illegal Characters in path. Start New Discussion I’m sorry to know after upgrading to Windows 10 when you try to update a program that exists on Computer you are getting error: The folder path 'Program Files' contains an invalid character. The colon is an illegal character in both types of OS, as it is used in both systems to differentiate between files and folders in a file path. - Any other character that the target file system does not allow. windows 10.0 visual studio 2017 version 15.3 Lukáš Forst reported Aug 23, 2017 at 10:34 AM - Integer value zero, sometimes referred to as the ASCII NUL character. created a … activities, error, string, question ... this means that you have chars that are not valid in windows. Your web files will be viewed by numerous users who use a wide variety of operating systems (Mac, PC, and Linux for instance) and devices (desktops, tablets, and smartphones are some examples). In the case of cleaning a file name of bad characters Regex works fine. Welcome to Microsoft Community. Windows 95 abandoned that to allow long file names, but still limited the maximum path length (which includes the full folder path and the file name) to 260 characters. 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