Hi, Have changed the HD and MB on this machine, after cloning the old HD. Now I can't open my saved Multisim files. I got a message telling the files can only be opened on the computer they were saved! Google didn't help. The old HD was formatted and installed elsewhere. Any ideas? Thanks. Mark Jordan -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist