Very pleased with this - the desktop seems brisker, and Firefox is transformed. Doing F12-Return on complex Draw and AW files shows they redraw in less than half the time. Putting two 8Mpix JPEGs on screen side by side and dragging one over the other is /much/ quicker and smoother. The only downside I've found so far is that Thump has to reload thumbnails for the images in each of my image directories, and this always takes a while the first time around (once done however it's very quick). Thanks again to Neil and his team.