. Cost-trap

Microsoft prefers to issue OEM Windows licensing, which binds the license to one particular machine. If you purchase a new machine, you can not re-use the existing OEM license that you paid for -- you must buy a brand new one.

In some cases you can not even upgrade hardware on an EXISTING Windows machine without having to purchase a new Windows license.

Given that many, many software applications exist now that are cross-platform, such as LibreOffice, you are no longer stuck with using just Windows -- especially for common business tasks. We can even show you how to get refunded for having to pay for a copy of Windows on most new machines (this is called "The Windows Tax").

. Sneakiness

When Microsoft rolled out Windows 10 -- they did a number of ~evil things. This included changing the meaning of the [x] on the close-dialog of the annoying, repeated, "Do you want to install Windows 10 now" dialog to mean -- "Yes, I want to install it". Something that [x] never meant in the past. And this was done without telling people and mid-stream; so after clicking [x] many times to STOP Windows from updating, [x] now did the reverse.

Windows 10 will also turn back on settings to share your data; even if you've switched them off. Typically, this has been happening during Windows 10 updates; which the user can no longer prevent from happening. This obliterates true 'User Choice'.