The Windows KB4549951 update was pushed out on April 14,2020
Users are reporting the update is causing BSOD and complete system crashes
Some users have reported that the Windows 10 KB4549951 update has been deleting files as well
Another Microsoft Windows Update has run afoul and is causing system crashes, blue screens of death and even data loss for several users. The update in questions is the KB4549951 for Windows 10 that Microsoft rolled on April 14, which has been causing issues for some users.
The KB4549951 update, according to Microsoft’s changelog, was supposed to bring updated security when using Microsoft Office and also when Windows performs basic tasks. Additionally, the update also brought some updates to the way Windows updates and stores files. In the known issues section, Microsoft does not list any problems with the update. The problem becomes worse when users report that the error code reported by the BSOD is just general stop codes with no clear pattern. So far, the following stop codes have been reported:
- PAGE_FAULT_IN_NONPAGED_AREA
- CRITICAL_PROCESS_DIED
- ACPI_BIOS_ERROR
- INACCESSIBLE BOOT DEVICE
- MEMORY_MANAGEMENT
- DPC_WATCHDOG_VIOLATION
- Portcls.sys
In addition, a number of users have also reported that after installing the update, their files have gone missing. Some users reported their documents and photos disappearing while others said their browser bookmarks vanished. The worst reports are of users who have said their systems went into BSOD loops, leading to complete system failure. Sadly, this is not the first Windows 10 update that's broken users' computers.
While the above accounts from multiple users may be true, the author of this story has faced none of the issues highlighted above. In case you find that your system has been adversely impacted by the KB4549951 update, you could potentially roll it back from the Windows recovery menu. You would need the Windows Installation media and once you boot up using that, the option to roll back the bad update should be available to you under the troubleshoot menu. Do note that this method is known to fail on some occasions, and does not have a 100 percent reliability rate.
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