Re your link. You ask where you can find the files. They are in C:\ You may find more than one autoexec and config so make sure you can see the extensions ".bat for the autoexec and .sys for the config file" Delete them both and reboot and see if that helps
If it still says "Bad command or file name" there is something in your autoexec batch file being loaded which you no longer have. Open wordpad or notepad and then find the file autoexec.bat in the root folder of C:\ and open it. Tell us what it says. It may be pointing to a "Path" that isn't there anymore.