Microsoft’s Might replace is failing to put in on some Home windows 11 PCs
Abstract created by Sensible Solutions AI
In abstract:
- PCWorld stories that Microsoft’s Might safety replace KB5089549 is failing to put in on some Home windows 11 units working variations 25H2 and 24H2.
- The set up fails at 35-36% completion with error code 0x800f0922, attributable to inadequate free house on the EFI System Partition.
- Microsoft provides non permanent workarounds together with Recognized Subject Rollback or registry tweaks whereas creating a everlasting repair for future launch.
Microsoft’s Might safety replace KB5089549 is failing to put in on some Home windows 11 machines. Microsoft has now acknowledged on this assist web page that the set up of this essential replace fails on some computer systems—whereas displaying error code 0x800f0922—if there’s inadequate free house on the EFI System Partition (ESP):
After putting in the Might 2026 Home windows safety replace, some units may expertise set up failures with error code 0x800f0922. This concern impacts units with restricted free house on the EFI System Partition, particularly when the machine has 10 MB or much less house accessible.
On this case, right here’s what occurs:
On affected units, the set up may proceed by means of the preliminary phases however fail through the reboot part at roughly 35–36% completion. The set up then rolls again with error code, and customers may see the message: “One thing didn’t go as deliberate. Undoing adjustments.”
Ensuing from this concern, customers could observe log entries much like the next in C:WindowsLogsCBSCBS.log, indicating inadequate free house on the EFI System Partition:
- “SpaceCheck: Inadequate free house”
- “ServicingBootFiles failed. Error = 0x70”
- “SpaceCheck:
utilized by third-party/OEM information exterior of Microsoft boot directories”
This concern presently impacts Home windows 11 variations 25H2 and 24H2, however not Home windows Server editions.
Microsoft provides two workarounds for affected customers.
One choice is to make use of Recognized Subject Rollback (KIR) to roll again the problematic replace to a earlier model, restoring the system to its state previous to putting in the replace. That is the safer choice for individuals who don’t have a whole lot of expertise tinkering with Home windows system information.
Should you do have expertise and admin rights, you may set up the replace with a registry tweak. Open the Energy Person menu with the Home windows key + X shortcut, launch Terminal as Admin, and enter this command:
reg add "HKLMSYSTEMCurrentControlSetControlBfsvc /v EspPaddingPercent /t REG_DWORD /d 0 /f"
Then restart your PC and check out putting in the replace once more.
Microsoft is engaged on a everlasting repair for this concern and can launch it as a part of one of many upcoming Home windows updates.
This text initially appeared on our sister publication PC-WELT and was translated and localized from German.
