A savvier person would have checked the box upon ordering that includes the operating system media for an extra $10 and then reformatted upon receiving. The reinstall takes about 30 min. of attended time and you're left with a fresh clean system for an insanely cheap price.

I know Joe User wouldn't know to do this, but for me it's well worth the inconvenience for the price.

EDIT: You're right about McAfee though. I've learned the tricks to uninstalling it now, but it's incredibly obtuse. Why can't they just make the uninstaller work right?