The price paid for a MacBook precludes the need for sponsors to lard a consumer PC with trialware to cover a profit margin. The same is the case with most business computers.
Even more insidious now is that these bloatware sponsors have pressured manufacturers to enforce the bloatware by not providing clean-copy installation DVD's required under their agreement with MS. So millions of consumers buying PC's don't even know how truly feather-light and instantaneous Windows 7 is when weighed down under a heap of crap.
Many tech enthusiasts find a clean-copy DVD of their OS version and reinstall using the OEM Product Key on the COA sticker on machine: re-install windows 7