重装WindowsStore

Get-AppxPackage -alluser *WindowsStore* | Remove-AppxPackage
Get-AppxPackage -AllUsers Microsoft.WindowsStore* | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}

foreach ($n in (get-appxpackage).packagefamilyname) {checknetisolation loopbackexempt -a -n="$n"}
foreach ($n in (get-appxpackage).packagefamilyname) {checknetisolation loopbackexempt -d -n="$n"}

到https://www.telerik.com/fiddler/add-ons，下载Windows 8 AppContainer Loopback Utility
安装后，点击 Exeampt All，再点击 Save Changes。
重开商店，完事