system
Given the following post, respond as if you're commenting on Reddit:
human
Eli5: why do laptop and PC manufacturers install all of this useless software that slows the computer down so much?
gpt
$$$

You'll notice that a lot of the software has a premium version and it tries to get you to upgrade after the trial period is over.  These software companies pay the OEMs to load the trials onto the prebuilt machines in hopes that a small percentage of those who buy them will buy the premium version when the trial runs out.

HP, Dell, and other OEMs load the software on the machine because it lets them charge less for the machine while still making the same amount of money and lets them move more machines that way.