Uninstall KB5094126 via Windows Recovery Environment (WinRE)

If your system freezes shortly after boot or you cannot access Windows normally, you must uninstall the update via WinRE. This is Microsoft’s primary recommended path for systems that can be reached before freezing [citation:1][citation:3].

Step A: Power on your PC. As Windows attempts to load (spinning dots), 
        press and hold the Power button for 5-10 seconds to force a hard shut down.
        Repeat this process TWO times.

Step B: On the third start, Windows will automatically boot into 
        Windows Recovery Environment (WinRE).

Step C: Navigate to: Troubleshoot → Advanced Options → Uninstall Updates

Step D: Select "Uninstall latest quality update"

Step E: Follow the prompts to remove KB5094126

Step F: Restart your PC

Apply ESP Registry Workaround — Fix HP BSOD 0xc0430001

The EFI System Partition (ESP) space constraint of 100MB (vs. recommended 500MB) causes Secure Boot certificate updates to fail on HP devices, triggering BSOD error 0xc0430001 [citation:1][citation:6]. This registry modification allows the update to complete without triggering the ESP failure [citation:1][citation:3].

Open Command Prompt or PowerShell as Administrator:

# Run this command exactly as shown
reg add "HKLM\SYSTEM\CurrentControlSet\Control\Bfsvc" /v EspPaddingPercent /t REG_DWORD /d 0 /f

# Restart your PC
# Then reinstall the update from Windows Update

Citation: Microsoft Q&A confirms this registry workaround resolves ESP-related update problems that cause freezes during or after installation [citation:3].

Install Newer Cumulative Update (KB5089573+)

The ESP-related freeze issue was fully fixed in updates released on May 26, 2026 (KB5089573) and later [citation:3]. If you can boot normally, installing the latest cumulative update may resolve the problem.

Step A: Press Win + I → Windows Update
Step B: Click "Check for updates"
Step C: Look for any cumulative update released after KB5089549/KB5089573
Step D: Click "Download and install"
Step E: Restart your PC

Citation: Microsoft Q&A recommends this as the primary fix for ESP-related update problems, noting that newer builds include fixes that can prevent freezes [citation:3].

Re-enable UAC — Fix OneDrive & Dropbox Explorer Breakage

KB5094126 breaks OneDrive and Dropbox integration in File Explorer when UAC (User Account Control) is disabled and the user has local administrator privileges [citation:1][citation:4][citation:9]. Re-enabling UAC restores Explorer functionality [citation:9].

Step A: Press Win + R → type "UserAccountControlSettings" → Enter
Step B: Move the slider to any level EXCEPT "Never notify"
Step C: Click OK → Restart your PC

If OneDrive still doesn't show in Explorer:
- Access OneDrive via: C:\Users\[YourUsername]\OneDrive
- Right-click the folder → "Pin to Quick Access"
- This temporary workaround allows access until Microsoft fixes the issue [citation:4]

Citation: Microsoft Japan confirms this issue and provides the Quick Access workaround [citation:4]. Chinese news outlets also report that re-enabling UAC resolves the problem [citation:9].

Permanently Block KB5094126 from Reinstalling

Many users report that KB5094126 reinstalls itself even after manual removal, ignoring wushowhide.diagcab and paused updates [citation:1][citation:5]. Here are the most reliable workarounds.

Method A — Pause Windows Update Service:
Step A: Press Win + R → type "services.msc" → Enter
Step B: Find "Windows Update"
Step C: Right-click → Stop
Step D: Right-click → Properties → Startup type: Manual
⚠️ Downside: You won't receive ANY updates until re-enabled [citation:5]

Method B — Set Metered Connection:
Step A: Settings → Network & internet → Wi-Fi/Ethernet
Step B: Click your network → Toggle ON "Metered connection"
Step C: Settings → Windows Update → Advanced options
Step D: Turn OFF "Download updates over metered connections" [citation:5]

Method C — Pause updates (temporary):
Settings → Windows Update → Advanced options → Pause updates for up to 3 weeks [citation:8]

Disable Low Latency Profile — Fix Severe CPU Lag on Hybrid Processors

On systems with hybrid processors (Intel i7 13850HX, etc.), KB5094126’s Low Latency Profile feature misallocates CPU boost to efficiency cores, trapping them at 100% usage and causing severe system lag [citation:8]. Microsoft has not yet issued an official fix [citation:8].

⚠️ There is currently NO official fix for this issue. Microsoft engineering is aware and investigating [citation:8].

Workaround: Uninstall KB5094126 and pause updates for up to 3 weeks [citation:8].

Avoid:
- Modifying registry settings (HKEY_LOCAL_MACHINE) undocumented
- Disabling processor cores artificially
- Using unofficial "fixes" from forums

These actions compromise long-term system integrity [citation:8].

Fix LAN Access Failure

Some users report that KB5094126 breaks local area network (LAN) access entirely while leaving internet connectivity intact [citation:1][citation:5].

Step A: Uninstall KB5094126 via WinRE or Settings (see Solution 1)
Step B: Block the update from reinstalling (see Solution 5)
Step C: Check network drivers are up to date (Device Manager → Network adapters)
Step D: Wait for Microsoft to release a fixed cumulative update

⚠️ Note: Network driver updates do NOT resolve this issue — it's caused by the update itself [citation:5].

BitLocker Recovery Prevention for Future Updates

To prevent BitLocker recovery loops from future updates, follow these preventive measures [citation:7].

Before installing any major Windows update:

Step A: Ensure your BitLocker recovery key is backed up:
       - To your Microsoft account (login.microsoftaccount.com/devices/recoverykey)
       - Printed copy
       - USB drive
       - Organizational Microsoft Entra ID (Azure AD) [citation:7]

Step B: Suspend BitLocker temporarily:
       manage-bde -protectors -disable C:

Step C: Install the update

Step D: Re-enable BitLocker:
       manage-bde -protectors -enable C:

If you are already in BitLocker recovery:
- Enter your 48-digit recovery key
- If you don't have it, there is NO way to bypass — wipe and reinstall is the only option [citation:7]