Thank you both for your input and suggestions. I don't seem to be having any problems with my internet so I didn't mention it. I have no lag time at all when I send and receive messages in IMs and in local chat. Only the mouse cursor lags to reflect the frame rate. It makes no difference whether or not I have programs running in the background.The lag spikes are always the same....3.5 minutes of normal (25-50 FPS), punctuated by one minute of lag. I tried a more accurate stat meter yesterday and my frame rate drops to a consistant 1.6-1.7 FPS, not 5 as I initially thought. Only the latest viewers are a problem. I use the same settings as the older viewers. I also recently moved to a new sim and it made absolutely no difference. Currently, I have only two choices. Either use the older viewers and see other avies as grey or suffer through these horrendous lag spikes. I have to tell people that I'm unable to move or type (unless I type and send messages "blindly"). The odd thing is that a few years back during a five-day power outtage, I logged onto SL on dialup and had much better frame rates than during these recent lag spikes!