I've had Windows 10 Pro installed as an upgrade from Windows 8.1 Pro since just before its official July 2015 release and since then it has been upgrading to v1511 last November and, finally, to various v1607 builds in the past few weeks to the current Build 14393.3 I am using now. I have been using a standard admin Microsoft account since Windows 8 so there have been no changes to my accounts. My PC was built in June 2013 which was when I installed Windows 8 Pro. Although, Windows runs 100% stable and all games and apps work as they should with no unexpected crashes or anything like that, I've encountered issues with the Windows Store updating certain apps and games which had been installed months before and had previously been updating fine. These apps are located on my H: drive, which is where I have either installed them or moved them to over the months to save space on my 256 GB boot SSD. The error is 0x80070005; I believe this means "access denied". However, it seems that apps and games installed on the Windows drive C:, will download and update fine. I've also discovered that I can move these affected games and apps from H: to C: and they will also update fine. If I set the Storage location back to C: then, again, I can install new games and apps fine as they are placed on the Windows drive. So there does not appear to be an issue with the way the Windows Store works when using the default Storage location (which is C. Alas, once I've moved games and apps to C: to update them then I am unable to move them back to H:... or any other drive for that matter, which includes D: and E: (these drives did not have a WindowsApps folder as I have never used them for relocating Windows Store apps previously). The error I get when attempting this is, you guessed it, error 0x80070005!!! Things I've tried to fix this issue include taking ownership of the H:\WindowsApps folder and the H:\WpSystem folder and changing the owner from TrustedInstaller to Darren and Administrators. I've even set all the accounts showing under Properties > Security to Full Control, added ALL APPLICATION PACKAGES, Everyone, Users, LOCAL SERVICE, NETWORK SERVICE... nothing works! It's infuriating. :bang: I did notice that the root permission for my H: drive was set to SYSTEM as are the ones for my D: and E: drive. My C: drive shows as Administrators though. Could this be the issue? What is the correct permission seeing as it doesn't affect Steam, Origin and UPlay games which are installed across my D:, E: and H: drives? I set the owner to Administrators on the root but did not take full ownership of the drive, only changed the H:\WindowsApps folder to Administrators (which did not work needless to add).