Microsoft said it has fixed a problem that caused some owners of its Surface RT device to end up with a bricked device after upgrading to Windows RT 8.1, and has reinstated the update on the Windows Store.
After Windows 8.1 was made available to download last week, reports started coming to light that some users upgrading ARM-based devices running the Windows RT version of the platform were finding that it would not boot afterwards.
Microsoft hurriedly pulled the Windows RT 8.1 upgrade from the online Windows Store while engineers looked at the problem. It soon became clear that the issue seemed to have hit users of Microsoft's own Surface RT tablet, while those with other Windows RT devices such as Dell's XPS 10 hybrid tablet appeared to be unaffected.
The firm offered a fix that involved downloading a system image of the original Windows RT code in order to restore their device to a working state.
Now, Microsoft has issued a statement informing users that the issue has been fixed, and that the update is available from the Windows Store once more.
"The update to Windows RT 8.1 is once again available as a free download in the Windows Store for users with Windows RT devices.
We immediately suspended availability of the update after reports that a very small number of Surface RT customers-around 1 out of every 1,000 Surface RT 8.1 installs-had experienced an issue that left the update incomplete and their devices unbootable.
The firm explained the issue occurred when "firmware updates had not completed at the time of the update to RT 8.1".
"In most cases, if a customer encountered this issue the result was simply an extra reboot. However, for a very small percentage, the boot configuration data was affected which prevented a successful boot," it said.
Meanwhile, Microsoft's updated Surface Pro 2 and Surface 2 tablets have today gone on sale to customers in 21 countries, including the UK.
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