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PATH! It is an absolute NO GO - NEVER EVER to redefine system or user environment variablePathwith command SETX using the string value of the local environment variable referenced with%Path%. The result is a systemPathwith all environment variable references expanded, with folder paths of userPathappended resulting in duplicates in concatenated localPathand perhaps removed folder paths caused by truncation of command SETX.Pathfrom within a Windows command prompt window or using a batch file is really difficult, see for example Why are other folder paths also added to system PATH with SetX and not only the specified folder path? The batch code in this post is much better, but is nevertheless not 100% fail-safe.environmentand Windows offers in language of Windows Edit the system environment variables and Edit environment variables for your account. Then the user should click on one of the two items to open the dialog window in which the user can modify safely the system and user environment variables. For more details aboutPathmanagement see also What is the reason for "X is not recognized as an internal or external command, operable program or batch file"?