I have an 128mb Nvidia GeForce4 Ti 4200 running on an Athlon 2200XP machine. I am having a problem with the display on some applications (mainly games). This takes the form of a symmetrical grid of small blue dots appearing across the screen. I can this problem when using PowerDVD by right clicking and enabling hardware acceleration under 'configuration'. However, when my kids are playing 'the Sims' and other games the same problem occurs but this solution is not possible (there is no configuration in the menu when I right click. Similarly the graphics tweaking options within the cgame are very limited). Are there any possible fixes anyone can suggest. I have downloaded the latest Nvidia drivers and am using Direct x 9. The diagnostic tool is showing no problems.