We have a business relationship in the sense that they advertise with us and in the magazine, yes. However, those sides of the business (advertising and editorial) are kept separate purely to avoid the conflicts of interest. The editorial team is autonomous and trained to ensure that advertising doesn't affect the standing of the reviews they write. We have reviewed pre-built PC before (though, as you say, not in a long time), but that's no reason not to do when the content is relevant and the samples available. You may well see more PCs like this reviewed in the future across the magazine and website.