I've been using Screenshot Captor for years, and I don't know when this problem started, but I've noticed recently that it's frequently using around 25% of the CPU cycles when it's supposedly not doing anything. When I observe it's usage for a while (when it's idle), I see it periodically go from 0% up to around 25%. This appears to be cyclical. It seems to spend about half the time at 0% and the other half of the time at approximately 25%. It's not an all-at-once jump up to 25% -- it usually takes a few seconds to climb up and again to come back down, and it usually stays at about 25% for around 25 seconds. I haven't been able to identify any events that might be triggering this. It also is usually non-responsive when it's CPU usage is high, to the point that Windows tells me it's non-responsive if I try to close it, even though the total CPU usage for the PC is almost always 60% or less. Reinstalling it made no difference.