The update is not applicable to your computer when upgraded Surface RT to Windows 8.1

When some people try to install the Windows 8.1 Update patch on the Surface RT tablet with enough free space, the Windows update standalone installer shows a “The update is not applicable to your computer” error. If you also face the same problem, here is the solution about how to fix the Windows 8.1 Preview language mismatch issues.

* For non US language version, Open Control Panel, select “Add language”. Add English > English US.
Change your current system locale to “English(United States)”. Open Region, go to Administrattive tab and click “change system locale…”.
* Manually install the Security Update KB2849636
Download Windows8-RT-KB2849636-arm.msu to a 8-1-temp folder in the root of the C drive.
Open Command Prompt with “Run as an Administrator”, type the command to expand the update:
Expand -F:* C:\8.1-temp\Windows8-RT-KB2849636-arm.msu C:\8-1-temp\
Apply the update:
DISM.exe /Online /Add-Package /PackagePath:C:\8-1-temp\Windows8-RT-KB2849636-x64.cab
* Reboot your tablet to apply the change and open Store to start the upgrade processing again.

If the above methods are still not working, you’d better download the Windows 8.1 Preview ISO files and install a clean copy.

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