Texture problems with new Dell XPS / Nvidia 7300

Need help solving a mystery - Brand new Dell XPS 400 with Nvidia 7300 - but FS20004 aircraft and scenery display erroneous texture mapping intermittently, and on both aircraft and scenery, both default and addon. For Example, the wheel on MAAM C-47 displays wing texture, or default Ford Trimotor engine brace displays alternate texture. Any Nvidia 7300 peculiarities, or perhaps the Windows XP service pack 2 issue?Thanks!