Win 10 is starting to be more and more annoying with each new update. In last ~2 weeks some colleagues reported issues with their computers. On 2 laptops USB drivers crashed after Win update ( can't turn it back ). Win 10 has the same issues as Win 8 with USB - basic driver is integrated in OS and there are no updates. You can reinstall it if manufacturer provides drivers. Problem is when computer is older and had upgrade from Win7 or Win8. In this case there is no way to fix it and have to reinstall all Win.
Next thing related to latest updates - Win is deleting some files or applications. This update was actually removed from win update as I heard. I thought it's not really happening as some people described but today I was testing something in PCMark 8 and after one of the restarts I've noticed that performance in games and some other tests is much lower ( 50-90% lower ). Later I noticed that Win deleted some Nvidia files
There were also some other issues on other computers. Like SQL2014 is losing some config files after each bigger update. List is longer and at home you can live with it but at work it can make a lot of problems.
MS still haven't solved activation issues. Keys are signed to PC randomly. If you upgrade from Win7 or Win8 to 10 then is no guarantee it will work next time you wish to reinstall it. On group licenses or academic it's not working at all. Not to mention that if you have group license like 10+ Win7 keys at work then after upgrade MS is counting it as 1 single, desktop/home type license. I asked MS representative about it. They simply don't want to fix it.
Simply after upgrade make OS image as you may need it if anything fails.