Thanks to those that provided assistance. Here's what transpired: I checked my WIN 95 cd for directory WIN\other\oldmsdos. The only files there were Help & Qbasic. So here's what I did: I copied the following files from a dos based pc into c:\dos on my PC: memmaker.exe chkstate.sys sizer.exe himem.sys . These files are needed to run memmaker Next I shutdown the pc and into dos prompt, then I ran memmaker making sure to select the option for expanded memory. This procedure worked fine, although I lost about 30k of conventional memory. As a precaution, I copied himem.sys & emm386.exe into the c:\windows directory. I rebooted the pc, then found the shortcut entry for my dos program. I selected properties. I clicked on Program tab, then selected "Advanced". For advanced program settings, I selected the first 2 options "Prevent MS-DOS based programs from detecting Windows, and "Suggest MS-Dos as necessary. Next I clicked on Memory tab, and behold the "expanded Memory" option was now available. I selected a parameter for expanded memory and saved the changes. I started the dos program and all is well. However, I do have one last question. When I displayed the c:\Windows directory under MS Explorer I could not see the "himem.sys file". It was hidden. I could see it when I executed the "dir command from a DOS prompt. Can someone tell me why?? > On Thursday, February 19, 1998 3:38 AM, Charly Rauscher > [SMTP:[log in to unmask]] wrote: > > I'm running a DOS based proprietary program under WIN 95. The vendor > > insists that I need to have expanded memory active for this program > > to work efficiently. When I look at the properties for this program I > > cannot activate the expanded memory option, it's greyed out.. I also > > noticed that I no longer have the "memmaker" program under the DOS > > directory. In fact, there's nothing in the DOS directory. > > > > Any help would be appreciated. Charly Rauscher Morgan Memorial Goodwill MIS Director 1010 Harrison Avenue 617 541-1297 Boston, MA 02119