and he's had nothing but problems so far. for one, the screen is unable to display full resolution – even when 1920x1080 is checked in options there's letterboxing on all four sides.
What monitor? Sounds like it's being displayed on a TV and you have underscan.
additionally, games refuse to work, or work partially. bioshock, for instance, has no sound in-game – but not in menus.
That's a Bioshock issue, download the patch, happened since launch, and even on the demo.
CoD: MW works up to a certain level. basically, nothing really works as it should.
Need more information, sofar it's externals, not internals that are the issues.
Sounds like he should make sure to install all service packs, updates, drivers, and patches before starting to find what's a problem and not just a 'quick-fix'.