For the video aperture settings, you may need to search about the Asus site or the web for the version specific to your mobo (it was an Asus if I recall). If the video card you are using is an APG card, you may need to adjust these settings for optimal use. One thing that I failed to ask previously. Is the PC you are using for your cocktail cab an HP or Compaq? If so, then next question I would ask is have you upgraded it it from its original configuration with a larger, faster, and/or additional hard drives, CD-ROM drives, etc.? Did you add additional fans for cooling? I ask these as one thing that many fail to consider when upgrading a pre-built system is the power supply that comes with the system is generally just powerful enough to manage the voltage needs of that configuration. Once you add a new drive or two, more powerful video card, etc. you end up exceeding the power supply's ability to keep up with the needs of the PC. Same goes for the number of fans. More upgrades usually means more heat, yet the base configuration is usually just enough to handle what was originally sold and cannot dissipate the additional heat generated. Under powered and overheating, if marginal, can cause inconsistant results. But I would probably run the Process Explorer prgram that HK mentioned first before poking around much more. It may uncover something we haven't thought of and would make any other suggestions moot.