I haven't had Windows fail to start ever but truly the computer is often nearly unusable for the first 30-60 minutes each day. I also had Windows 10 "blue screen" on me one time when the system was in one of its fits of grinding away like it does on startup each day. It was the first time I had ever seen such a fault from Windows 10. It wasn't the typical Windows NT-style blue screen but it was clearly a major fault in the system that resulted in Windows reloading. That has only happened once.
I'd like to make a Microsoft developer or executive suffer through using my laptop for a week.