The only recent and granular review of tech support is by Laptop magazine: I figure these scores will apply to desktops as well. They give a 60% weight to the website and 40% weight to phone support. (I tried giving the web score an even stronger 70% weight, but it didn't change the ordering).
Apple comes out on top. Acer and Lenovo follow.
Microsoft and HP trail.
Dell is after that.
Asus is last among the majors.
Consumer Reports thinks Apple provides excellent phone support and very good online support. Dell, Lenovo, HP, ASUS, Samsung, Acer, and Toshiba receive poor marks in both categories. PC World used to have a great tech support survey, but that was a while ago.
According to Consumer Reports, the estimated 3 year breakage rate for Apples is 13%. For ASUS, Dell, Acer, Lenovo and HP it's in the 23-26% range. Differences of less than 4 points aren't meaningful, so call it a tie with HP trailing in last. So for windows PCs, I'd assume computer problems will happen and focus on tech support quality.
This 2015 article said Lenovo was worst for bloatware (eg Superfish) with HP not far behind. Dell got better marks. Removing bloatware typically isn't difficult, but I found it time consuming to distinguish between needed/helpful software and crap. Someone here recommends simply reinstalling the OS, but I'm guessing that might void the warranty. One vendor told me that adding a data partition would do that , for example.
Specialist manufacturers offer silent PCs and the ambitious can build their own. One commentor recommends putting the PC in a separate room and feeding 15 foot wires to the monitor, keyboard and mouse. Or buy a laptop! This 2012 article recommends Apples, ASUS and Lenovos. It says that Dell and HP computers tend to be noisier.
In terms of worldwide PC shipments, HP and Lenovo are on top (20-22% each). Dell trails in 3rd place (15-16%). ASUS, Apple and Acer are tied for 4th (7-8% each). Wiki page.