I have a Windows Asus PC that I purchased just at the time that Windows 10 became available. Other than upgrading the RAM and upgrading the hard disk twice, most recently with an SSD I have done nothing to it and never had any problems. I do not use MS programs other than the operating system and use Mozilla Firefox and Thunderbird plus LibreOffice instead of the equivalent MS products. It has always performed well and within expectations. I saw the new MS browser update but don't use it.
I could have written the above word for word and like Gambalunga, I have never had a problem with W10 and MS. From what I have read elsewhere, most difficulties seem to be with computers where the system was updated from W7 or similar. And some of the MS applications are the pits - Outlook for example - so I use free apps like Firefox, Thunderbird and Libre Office..
I get wore "funnies" on my Iphone and more still on an Android tablet.