The W 10 Upgrade is around the corner. I have W 8.1 installed and would like to know whether W 8.1 needs to be updated completely before the upgrade is performed. I am asking this question for the following reason: Since the June 9, 2015 Patch Tuesday I am unable to update W 8.1 All available updates fail. I tried to fix it with MS help (they could not), and I am still searching for a solution. The same will probably happen with updates on the July Patch Tuesday. That is the situation. I am not asking for a solution for the update issue but the question is: would W10 refuse the upgrade, if W 8.1 is not up to the latest update?
If the upgrade would work, does it mean it overwrites everything in W 8.1? Please note, that the PC is running fine and normal except for the update.