When I want to use self configured DOS-Sessions for explicite DOS-Programs, my computer stops when rebooting with the error message "Fehler beim Anlegen der Datei" (Error at creating file). Since I didn't had problems earlier, I think some program or game I installed did something wrong. When I try to use my old Command.com in the DOS622 Directory, the computer stops, saying "Falsche DOS Version" (Wrong DOS Version).
What is wrong with my computer? WIN95-programs don't have problems, so I don't think I destroyed the system. I don't know what file WIN95 tries to write on which disk nor why WIN95 can't write that file.