Every PC may as well be marked with this.

Removing the screws and touching the parts inside is tough enough when you have an instruction manual in front of you -- but without knowing what's wrong, everything looks the same. All those settings in the software: which one is the right one?

We've got the mastery -- Mac or PC -- to diagnose and repair an injured computer. Only a skilled technician need step into uncharted waters. Anyone else is taking an unneeded risk.