Hi all, After having a hard time locating the problem, we found that the BIOS was lost but the hard drive was still working, just as some of you suggested. We hooked the hard drive up to another old computer, and copied the program over. So far the program is running well in this new configuration, although there might be potential incompatibilities. After all, problem seems solved. Thank you very much for your help! Yuanbo Zhang Graduate Student Dept. of Physics, Columbia University 538 West 120th St., PUPIN 704 New York, NY 10027 Phone: (212)8540393 Fax: (212)8540392