(AP) Microsoft says a problem caused when updating computers to Windows 8.1 RT is limited to its own Surface RT devices.
The issue was discovered over the weekend. Some users who tried to download an update to the year-old Windows 8 RT operating system would find their machines would shut off during the download and become inoperable, a phenomenon known as "bricking."
Microsoft said Monday the problem affected less than 1 out of every 1,000 Surface RT machines. It hasn't yet found out what the problem is exactly.
For now, the Windows 8.1 RT download has been removed from the Windows Store.
Microsoft also offered a way to revive the unit and complete the update using a USB drive.
Windows 8.1 RT recovery steps: http://bit.ly/1h1g25k