Thumbnail JPGs and GIFS on websites are displaying grain or 'pixelation', although advertising banners seem OK, as do JPG and GIF images already stored on disk - I display those using IrfanView.
In addition, when I use some programs which change large chunks of graphics for different menu options, the graphics go all strange colours and distorted before redisplaying OK, although this can take a few seconds. I've also noticed that some programs, such as System Mechanic take more then 5 seconds to launch from the desktop - this only started happening a few days ago, possibly after installing the Zoomify plugin for IE, and I don't think that this can be removed.
I've tried reinstalling the display driver, but this has made no difference, although I could only use copies of the existing files as I don't have the original Windows disks.
It's a Win98SE system using IE 5.5 SP2 and a S3 Trio 64V + PCI (765) graphics card.