After update 2026-02 Security Update (KB5077181) (26200.7840)

Question

After update to 2026-02 Security Update (KB5077181) (26200.7840)

PC not working

Answer 1

Hi sadirul islam,
Welcome to Microsoft Q&A forum. I'm happy to help.

Please try uninstalling the problem update following this article: How to uninstall a Windows Update.

You may do so on Windows environment or Windows RE if you cannot access Windows.

If you have any updated information, please feel free to let me know.

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Answer 2

Can you please share more about the issue you started facing after installing updates? We can help better.

Answer 3

Please provide full details on the problems you are experiencing after installing that February update, and if possible a screenshot of any error you may be seeing, so I can provide you with a solution.

Answer 4

KB5077181 is the February 10, 2026 cumulative security update for Windows 11 versions 24H2 and 25H2 (OS builds 26200.7840 and 26100.7840). If the PC stopped working properly right after installing this update, use the following steps to recover and then address possible side effects:

1. Try a full power drain (helps with Bluetooth/Wi‑Fi and some hardware issues)
   • Shut Windows down completely.
   • Turn off the PC and, if it is a desktop, switch off the PSU and unplug the power cable. For a laptop, disconnect the power adapter and, if possible, remove external peripherals.
   • Hold the physical power button for about 30 seconds.
   • Wait 5–10 minutes.
   • Plug power back in, turn on the PSU (if desktop), and boot the PC.
   • Check whether keyboard/mouse, Bluetooth, Wi‑Fi, and display now work normally. This workaround has resolved post‑KB5077181 Bluetooth/Wi‑Fi failures for multiple users.
2. If Windows will not boot normally, use Windows Recovery Environment (WinRE)
   • Power on the device and as soon as the Windows or manufacturer logo appears, press and hold the power button until it shuts down.
   • Repeat this power‑on then forced‑off cycle 2–3 times.
   • On the third start, Windows should show “Preparing Automatic Repair” and then the recovery menu.
   • Select Advanced options.
   • First try Startup Repair. If that does not fix boot, go back to Advanced options and use System Restore to roll back to a restore point from before KB5077181.
   • If System Restore is not available or fails, use Reset this PC → Keep my files to reinstall Windows while preserving personal files. This will remove apps and settings, so back up anything accessible first.
3. If the PC boots but has missing devices (e.g., drivers not working)
   • Run Windows Update again after the major update to reinstall any drivers that did not migrate correctly.
   • Open Settings → Windows Update and check for updates until no further driver or quality updates are offered.
4. If KB5077181 must be removed from a working system
   • KB5077181 is a combined Servicing Stack Update (SSU) + Latest Cumulative Update (LCU). The SSU part cannot be removed.
   • To remove only the LCU portion, run an elevated Command Prompt and use DISM:
     • First list packages: DISM /online /get-packages
     • Identify the package name corresponding to KB5077181.
     • Remove it: DISM /online /Remove-Package /PackageName:<package-name>
   • Using wusa.exe /uninstall on this combined package will not work because the SSU cannot be uninstalled.
5. If using WSUS or offline media (for future reinstalls)
   • Ensure WSUS is configured with Product: Windows 11 and Classification: Security Updates so KB5077181 syncs correctly.
   • For manual/offline installs, download the MSU(s) for KB5077181 from the Microsoft Update Catalog and either:
     • Install all MSU files together using DISM or Add-WindowsPackage, or
     • Install each MSU individually in the documented order.

If, after these steps, the PC is still unusable, perform a Reset this PC → Keep my files from WinRE as a last resort to restore system functionality while preserving personal data.

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References:

• February 10, 2026—KB5077181 (OS Builds 26200.7840 and 26100.7840)
• Devices not working after a major Windows update
• KB5077181 broke Bluetooth - Microsoft Q&A
• New laptop MSI won't go past update installation at first boot - Microsoft Q&A