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Windows 8.1 Store not working WWAHost.exe Failing? :Solved

 
Microsoft is rolling out Windows 8.1 as a free upgrade for all Windows 8 users. But installing the new OS may not be as simple as it sounds, particularly for those with multiple computers to manage or those who installed the earlier Windows 8.1 Preview.

The basics are simple enough: Windows 8 users can apply the update by downloading it from Microsoft's Windows Store.

first : what is exactly WWAHost.exe?

"The process that hosts and executes a Metro style app using JavaScript is called WWAHost.exe. This process provides a superset of functionality greater than that provided by the Microsoft Internet Explorer browser. Therefore, if your web app runs under Internet Explorer (and does not incorporate the unsupported technologies listed later in this topic), it can also easily be run under WWAHost.exe."


 How to solve this Problem?

1. At the start menu, type cmd.exe. You will see "Command Prompt" in the results list. Right-click on it. A context menu-bar will show up at the bottom of the screen. Click on "Run as administrator". Click "yes" to the User Account Control prompt. Command shell will start.

2. Let's see your LOCALAPPDATA setting. Type...
C:\>set LOCALAPPDATA
LOCALAPPDATA=C:\Users\Paul\AppData\Local


3. Let's see the contents of the WinStore_cw5n1h2txyewy folder. Type...

C:\>dir "%LOCALAPPDATA%\Packages\WinStore_cw5n1h2txyewy"
 Volume in drive C is System
 Volume Serial Number is CE28-C1D0
 Directory of C:\Users\Paul\AppData\Local\Packages\WinStore_cw5n1h2txyewy
03/18/2013  11:24 PM    <DIR>          .
03/18/2013  11:24 PM    <DIR>          ..
03/18/2013  11:25 PM    <DIR>          AC
03/18/2013  11:24 PM    <DIR>          Settings

4. Do you have the AC folder? If not type...

C:\>md "%LOCALAPPDATA%\Packages\WinStore_cw5n1h2txyewy\AC\PRICache"

5. Now check the ACEs (Access Control Entries) in the ACL (Access Control List) for the AC the folder. Type...

C:\>icacls "%LOCALAPPDATA%\Packages\WinStore_cw5n1h2txyewy\AC"
C:\Users\Paul\AppData\Local\Packages\WinStore_cw5n1h2txyewy\AC S-1-15-2-2608634532-1453884237-1118350049-1925931850-670756941-1603938316-3764965493:(OI)(CI)(F)
                                                               NT AUTHORITY\SYSTEM:(I)(OI)(CI)(F)
                                                               BUILTIN\Administrators:(I)(OI)(CI)(F)
                                                               PAULBROHOME\Paul:(I)(OI)(CI)(F)
                                                               Mandatory Label\Low Mandatory Level:(OI)(CI)(NW)
Successfully processed 1 files; Failed processing 0 files

6. Do you see the S-1-15-2.... and "Mandatory Label\Low Mandatory Level" ACEs in the list? If not, type...

C:\>icacls "%LOCALAPPDATA%\Packages\WinStore_cw5n1h2txyewy\AC" /grant *S-1-15-2-2608634532-1453884237-1118350049-1925931850-670756941-1603938316-3764965493:(OI)(CI)(F) /setintegritylevel (OI)(CI)L
processed file: C:\Users\Paul\AppData\Local\Packages\WinStore_cw5n1h2txyewy\AC\
Successfully processed 1 files; Failed processing 0 files

6. Try to launch the Store app

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