A few days ago my wife's Toshiba Satellite laptop running W8.1 ran into problems with the new Norton automatic upgrade. I am accessing thes forum from my older HP 64 bit Desktop still running Vista!(no W10 in it's future). After an online/remoter access chat with Norton they got the new version installed on the Toshiba. Next the W10 upgrade was attempted from the screen prompt saying it was ready. That was unscuccessfull. It took over 24 hours, got to 100% complete but did not install. Thinking it may be due to either Google Chrome or Norton I uninstalled all Google and did a restore to before 8/4/15(before the Norton problem) forgetting Google was on then. Now my screen just blinks and the only way I can shut it off is by Power off since I can not get any desktop icons to respond. Can not get to Restore, App Mgr, anything. All all grayed and none respond to clicks. I have read up on Safe Mode and would like to get there but am unable to. Not sure where to start but first have to regain some level of control of the pc. The blinking is driving me crazy! Yhanks for any thoughts or ideas. 
My Computer
System One
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- OS
- windows 8.1