Well until the last few days I have had no real problems with Win 10 but I do have one now that seems to have been around for a while in 8.1 as well.
Possibly caused by a recent Win 10 update but a few days ago my start button stopped working, no access to menu tiles or any other programmes. I also notice that the 'New notifications' icon is showing white on the taskbar bar but will not open or respond either. The only way I can shut down is by right clicking the start button.
A bit of research suggests quite an involved process for clearing this problem but other posts said to just leave it and see if it cleared.
I did this and after restarting a couple of times it did clear and was fine for three days but the problem has returned today and doesn't seem to want to go away.