OSFDVHLP Accept this drive letter if this is the location of the CONFIG.SYS file to be edited. If not, enter a new drive. If you are installing for DOS (which you can do only when DOS is the active operating system), please be sure to specify the drive on which your CONFIG.SYS for DOS is located. If you are installing for OS/2 - and are therefore running this program from a full-screen OS/2 or DOS-OS/2 session - please enter the drive on which the CONFIG.SYS for OS/2 is located.