Windows update preview: Taskbar issues and 0x800f0845 error on Macs

The update preview for Windows 11 is stuck: The taskbar is causing problems. Mac users are also reporting 0x800f0845 errors.

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Verzweifeltes Monster sitzt auf Laptop, das Windows Update ausführt

Problematic Windows update.

(Image: Erstellt durch KI mit Bing Designer von heise online / dmk)

3 min. read
This article was originally published in German and has been automatically translated.

The May update preview for Windows 11, which Microsoft published on Thursday night, is causing problems on some systems. Mac users are reporting installation errors with the error number 0x800f0845. Meanwhile, Microsoft confirms that the update may cause issues with the taskbar.

In the announcement of the update preview for Windows 11, Microsoft has now confirmed problems with the taskbar after installing the software patch under "Known Issues". The taskbar may occasionally exhibit incorrect behavior: it may not respond, disappear and reappear automatically. The event ID 1000 may appear in the event log and Explorer.EXE may appear as the faulty application and Taskbar.View.dll as the name of the faulty module.

Microsoft wants to use Known Issue Rollback (KIR) to uninstall the update or parts of it on Home, Pro and unmanaged Windows machines. This can take up to 24 hours, the developers explain. For IT managers, however, the Redmond programmers are offering group guidelines for download that they can use to accomplish this. A check of some Windows devices with the update shows that they are still displayed as installed – it is only a matter of individual components from the update preview.

There are also problems with the update preview on Mac computers. A reader pointed out to us that in Parallels 19.4.0 on an M2 Mac Mini with macOS Ventura 13.6.7, the installation of the update in Windows 11 on ARM is aborted with the error code 0x800F0845 and a roll-back is performed. This seems to be a widespread issue. It apparently started with last week's Windows Insider release and is now also affecting the regular update preview.

There are reports from several affected users in the Parallels forum. There are indications that the Bitlocker keys need to be entered after the roll-back, which is a concern if users have not previously created a backup of them. Initial attempts to solve the problem, such as installing the update preview from the Windows update catalog, had no effect. Others point out that no such problem occurs under Proxmox with Intel processor architecture.

It is currently unclear whether this is a Parallels or Windows issue. The Parallels developers are analyzing the problem, which an employee in the forum mentioned in the discussion tonight. Microsoft should be aware of the problems by now through an insider message via the Feedback Hub.

On Thursday night, Microsoft published the May update previews for Windows 10 and 11. In these previews, the company tests the non-security-related components of the cumulative update package, which will include security fixes for Patchday on the night of the second Tuesday of the month to the second Wednesday. This time, some of these changes will probably be released beforehand - or the developers will manage to correct them in time.

(dmk)