Stack Checker Public Domain software Stackchk.com is a tiny assembly language program, coded from instructions in a magazine. Included is the source code (stackchk.scr) which you can study and modify. Stackchk examines your computer and tries to determine if any, and how many, DOS stacks have been used prior to making its examination. Stackchk was written during the height of the DOS stacks vs no DOS stacks debate. It can sometimes be fooled, but as far as I know, it is the only program of its type. For best results, boot DOS clean, run an application program (in a way that you think may possibly cause it to use some DOS stacks), and upon returning to the DOS command prompt, run Stackchk. If the application used any DOS stacks, Stackchk will usually be able to tell. FYI: the answer to the question is "yes, you should run stacks, but no, you don't need to run as many as Microsoft suggests" (stacks=8,192 seems to be an ideal compromise). .