Some consumers trying to upgrade their computers to Windows 10 have run into a bug that is rendering their machines inoperative.
Instead of being able to use Microsoft’s new operating system, they get an error that says their computer has a “missing operating system.” Some also said their drives reported having nothing on them after the attempted upgrade.
On one Microsoft forum page devoted to the bug, some 25 people reported experiencing the same issue. On Windows 10 Forums, an independent discussion site, a separate thread had attracted more than three dozen posts from users experiencing similar problems.
“Upgrade was going very, very well, and after the installer got to around 89 percent, the computer rebooted,” a consumer identified as “jhuck5″ wrote on the Microsoft forum page. “During the reboot, the BIOS screen appears with a black screen and ‘Missing Operating System.’”
Microsoft released Windows 10 last week. The software has been praised for addressing the shortcomings of Windows 8, but has been criticized for raising privacy and security concerns.