If you use Windows 10, and Windows Store does not appear, follow the procedures described in this post below:
http://www.tenforums.com/tutorials/16397-repair-install-windows-10-place-upgrade.html
obs: (If you have not mastered the English language, click the right mouse button and ask to translate the page)
My problem started when I tried to use a command in powershell to reinstall the applications, but for some reason some apps (email, weather, calendar, news, etc.) and were not opened with the names @ {microsoft ...}
After trying to install all the applications I have installed have been preserved and settings as well. The dilemma of format or was not just this, because I do not want to lose two days reinstalling all (Visual Studio 2013, SQL Server, Oracle, crystal reports ... etc).
I spent two weeks trying to solve this problem by running thousands of commands in powershell, regedit, msconfig and cmd ... but only solved so. ;)
extracted from my blog: (http://baldsworld.blogspot.com.br)