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Good evening, I have not used any Windows-system in years and dare ask you for an information which will help rather a user of my own software than myself. My free utility that does platform-independently convert EML-files to PDF may use other tools if they are installed on the same computer. For this purpose, my program looks for the executables in the folders which are referenced in the PATH-variable. Now, one user tells me that the folder 'C' is reported to be inexistent on his system, while it is obviously named in the PATH-variable. I have to deduce the meaning of this observation myself, which is as good as impossible. Can you tell me a few things, which may help me understand how I must modify my utility ? Does it make sense to reference C: in the PATH-variable? I remember Autoexec.bat but also, that programs are usually installed elsewhere. Which rules exist nowadays, that may melp me identify root-folders and exempt them from my search for executable files? Are they still named with 1-letter designators or are there other possibilities? Is there a different, maybe more straight-forward explanation for my inability to *use* C: as a directory like any of the others, which are referenced in PATH? Thank you in advance and do not hesitate, if you have some non-MS-specific questions. My utility-program is here: Crème Fraiche. The current version is flawed in the way that you must have an environment-variable 'LANG', else the program crashes miserably . A correction is due to be released tomorrow.