I had to use system restore on my win 10 laptop because START button stopped- and right click on start - stopped, and everything else said: application not registered. For a change system restore worked - BUT restore to last point- 2 days ago---says product not activated. I foolishly waste time to run the Micro$haft activation troublemaker and get one of the best Star Trek 3 double dumb-ssed messages: we found a windows 10 home digital license for this device running Windows 10 home. To activate using this digital license, you need to install windows 1o home---- That Catcha 22 is some catcha--- You can not pay for entertainment of this caliber. My Doberman still says bow! wow! for this o/s...and he has been dead for 3 years.