The windows 10 start menu stopped working a couple of days ago. It is not even available with the right click of the mouse. It takes forever for the task bar to load and during that period the screen (monitor) flickers about 10 times. Up until a couple of days ago this machine was working perfectly. I was able to access by way of the task manager the sfc /scannow utility and ran it but it found no problems. My guess is that this problem has been caused by a windows update this week. I am not able to go to a restore point...with windows 10 that is a different sequence...the function keys do not work in terms of allowing one to go into safe mode. Apparently with windows 10 you must get in to safe mode by using the start button and then doing a restart while holding down the shift key. What is your take on all of this and what do you recommend to solve this problem. I have a backup on hand on an external drive.