How to Clear Windows Store Cache in Windows 8 and 8.1
This will not delete any of your installed apps or account settings.
PART ONEClear Store Cache for Default Apps
1. Press the Windows+R keys on your keyboard to open the Run dialog.
2. Type WSReset.exe, and click/tap on OK.
3. In Windows 8 and Windows RT, the Store will now open, and state the following: The cache for the store was cleared. You can now browse the store for apps.
4. In Windows 8.1 and Windows RT 8.1, the Store will now open without any message. You can now browse the store for apps.
PART TWOClear Store Cache for 3rd Party Apps
You must be signed in as an administrator to be able to do this section.
5. Open an elevated command prompt.
6. In the elevated command prompt, copy and paste the command below, and press Enter. This will give you the user SID for each account on the PC. Make note of the SID (ex: S-1-5-21-1505978256-3813739684-4272618129-1016) for the user account that apps are not working in. (see screenshot below)
wmic useraccount get name,sid
7. Press the Windows+R keys on your keyboard to open the Run dialog, type regedit, and click/tap on OK.
8. If prompted by UAC, then click/tap on Yes.
9. In Registry Editor, navigate to the location below. (see screenshot below)
10. In the left pane under the AppxAllUserStore key, right click on the SID key (ex: S-1-5-21-1505978256-3813739684-4272618129-1016) from step 6 above, click on Delete, and Yes to approve. (see screenshot above)
11. Close Registry Editor and the elevated command prompt.
12. Restart the computer to apply.
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