Thanks.  The software developer suggests "to check the Acer and/or Intel web sites and see if they have a newer video driver available".

To me it seems like more than a PC performance issue. It doesn't appear to be universal though either, so it seems like the software company is a little stumped right now what's causing it. Apparently this has happened in Mavens software for a while, according to one player. Playing Heads-Up though it's more of an inconvenience (cause you might lose a blind or two while you login again), and you're also changing tables more often so it has more of a chance to happen, so I'm gonna do everything I can to help get it figured out.