Upgrade hold in place

Windows 11 known issues blocking upgrade

Microsoft publishes the known issues found in the initial rollout of Windows 11, and it's placing a temporary block to affected devices.

Windows 11 21H2 known issues
  • Microsoft publishes the Windows 11 known issues.
  • The initial release includes three compatibility issues blocking the upgrade.
  • You shouldn’t try to upgrade if your PC has one of these problems.

On October 5, Microsoft began the slow and controlled rollout of Windows 11 (version 21H2), the next version of the OS that brings an overhauled interface and a lot of new features. Along with the initial release, the company also published a list of the current known issues that may negatively affect some computers.

The complete list of Windows 11 known issues was released on the health dashboard page, and at the time of this writing, it only includes three problems that have been confirmed. As a result of these issues, the affected computers currently have an upgrade hold until the problem has been resolved.

Known issues affecting Windows 11

This is the list of confirmed known issues blocking the Windows 11 upgrade:

  • Installation of printers might fail when attempted over some network connections: This issue has been observed in devices that access printers via a print server using HTTP connections. This problem is affecting Windows 11 and Windows 10.
  • Custom printing properties might not be correctly provided to print server clients: This issue will not cause printing operations to fail, but clients might print with default settings only. This problem is affecting Windows 11 and Windows 10.
  • Installation of printers via Internet Printing Protocol (IPP) might not succeed: IPP is not commonly used by devices designed for home use. Microsoft is working on a resolution and targeting its release in a future update. This problem is affecting Windows 11 and Windows 10.
  • Compatibility issues between Oracle VirtualBox and Windows 11. This issue prevents VirtualBox virtual machines from starting if the computer also has Hyper-V installed.
  • Compatibility issues with apps using some non-ASCII characters in their registry keys. Some applications using non-ASCII characters in the Registry won’t be able to run correctly. Also, affected keys may not be repairable.
  • Compatibility issues with Intel “Killer” and “SmartByte” networking software. This problem may cause the internet to be slower on affected computers. (Resolved)

Although there are a few issues, they are only affecting a small group of devices, and at the time of this writing, Microsoft is placing an upgrade hold until there is a fix for these problems. In the meantime, the company recommends not to upgrade manually to prevent a negative experience.

Windows 11 seems that is off to a good start, but it doesn’t mean that more issues will appear. As more computers install version 21H2, the company will update the dashboard page with more information and possible workarounds where applicable.

In addition to these issues, Windows 11 also have another big problem, a memory leak caused by a bug in File Explorer, which Microsoft has not acknowledged as a bug, but it is affecting some devices.

Update October 14, 2021: This post has been updated to reflect the new issues and ones that were resolved.