Windows 10: Start-Button stops working after random time

Hello!
My start-button in windows 10 1511 becomes unresponsive after some time of working. The programs already running keep on running normally, but sometimes if this problem occurs, i can't open task-manager through ctrl-shift-esc, ctrl-alt-del doesn't work also. This doesn't occur every day: There are sometimes multiple days in a row upt to one or two weeks, the system runs absolutely flawlessly, but then there are days, i have to turn-off and turn-on my system every 5-30 minutes. I already tried sfc /scannow but the only thing it finds is a faulty checksum of some opencl-compnent of my nvidia driver, which seems to be a common thing, what i read on the web.
Any ideas?
thx in advance,


:)

 

Shortcut keys on my E65 stop working after a while

Did you try a firmware update? After updating my firmware this random behavior of the quick access buttons has stopped. The only case when these buttons stop working is when using alarm software, like bgxx mentioned. Unfortunately in my case the buttons
stop working even though I'm using Epocware Handy Clock.

 

Lumia 930 Capacitive Keys random behavior

I have a Lumia 930 and I have notice several issues regarding the capacitive keys - mainly back and search buttons.

Some times the search key is randomly activating itself, by enabling Cortana. The screen is not reacting to any touch. I have to lock and unlock the phone in order to continue using it. At some point I thought it was the Hey Cortana feature, so i deactivated.
But it was not that.

Now the button stopped working at all. At some point it start working again and after a while, again randomely it was triggered. Now it hs completely stopped working.The rest of the capacitive keys are working properly.

At some point, I cleaned my screen - even though it was clean enough, but some finger prints - with a fiber fabric and coincidentally all buttons start working. and after a day again random behavior. Now, the cleaning of the screen didn't help. In addition
I have played around with various settings, such as touch sensitivity, key vibrations etc. None of them seem to help.

Another similar issue i had few days ago, i noticed that suddenly the phone was in the app switcher and i assume that the back button was

randomely triggered. Once again, i had to lock and unlock the phone. I haven't seen this issue since the search button started triggering itself.

While searching for similar problems of other users, i found that also other Lumias have similar issues since last year. But no one reports the solution he found - if there is any. Most probable because at some point the keys start working again.

Any suggestions?

Model: Lumia 930

OS version: 8.10.14219.341