Windows 10 Windows 10 KB5048652 issue

Hi @drhubb,
The issue you're describing — significant slowdowns in startup time following the installation of the KB5048652 update — certainly indicates that something in this patch is affecting your system's boot process. You’re definitely not alone when it comes to Windows updates occasionally wreaking havoc on performance; similar complaints sometimes arise following cumulative updates.
Let me break down some possible causes and resolutions:

Possible Causes:​

1. Startup Conflicts:
   • The update might have enabled or altered certain startup programs or services. New components introduced in updates can sometimes register themselves to auto-start.
2. Driver Issues:
   • Some updates can clash with outdated or incompatible drivers, causing performance bottlenecks during startup.
3. Disk Optimization Pending:
   • After a major update, Windows often performs post-update tasks like indexing files or optimizing the disk, which can increase boot times temporarily.
4. Background Services:
   • It's possible that KB5048652 has introduced new background services or processes that increase the load during startup.
5. Corrupted Files:
   • System files or other components updated during the installation might have glitches, leading to inefficiencies.

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Steps to Diagnose and Fix the Issue:​

1. Check Startup Programs:​

• Press Ctrl + Shift + Esc to open Task Manager.
• Go to the Startup tab and review the list:
  • Disable anything unnecessary by right-clicking and selecting "Disable". Ensure critical system processes are untouched.

2. Update Supporting Drivers:​

• Run Device Manager and update drivers for your key components, especially for:
  • Graphics card
  • Disk drives
  • Network adapters
  If you suspect driver issues, try rolling back any driver that was updated close to the time the update was installed.

3. Run Disk Cleanup:​

• Open the Start menu, type Disk Cleanup, and select it.
• Clean system files related to Windows Update (make sure to check "Windows Update Clean-up").

4. Assess Windows Services:​

• Open the Run dialog (Windows Key + R), type services.msc, and press Enter.
• Look for any services related to the update (these might include diagnostics or telemetry-related services) and try setting them to "Manual" for testing purposes.

5. Check for Pending Updates:​

• Sometimes, slowdowns are resolved after follow-up bug fixes issued by Microsoft:
  • Go to Settings > Update & Security > Windows Update.
  • Check for and install any additional updates.

6. Undo the Update (if necessary):​

If the problem persists and no acceptable workaround appears, consider rolling back the KB5048652 update:

• Open Settings > Update & Security > Windows Update.
• Select View update history > Uninstall updates.
• Locate KB5048652 and uninstall it to see if performance improves.
  Be sure to let Microsoft know via Feedback Hub if this resolves your issue, as it may signal a wider problem they need to address.

7. Log Analysis:​

A closer look at startup logs might help. Use Event Viewer:

• Open Start, type Event Viewer, and launch it.
• Navigate to Windows Logs > System, look for any errors or warnings during startup.

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Temporary Workarounds:​

• Clean Boot:
  • Perform a clean boot (disable all startup items and non-Microsoft services) to isolate third-party conflicts:
  • Type msconfig in the Run dialog, go to the Services tab, check "Hide all Microsoft services", then disable the rest.
• Optimize Startup Settings:
  • If you're running an HDD, consider enabling Fast Startup in the Control Panel under Power Options > Choose what the power button does.

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If these suggestions don't help, feel free to provide any additional symptoms or share logs — I’ll be glad to dive deeper into the problem! Let me know if you’ve noticed any other performance issues accompanying the startup delay.

If your startup time slowed after the KB5048652 update, try these:

1. Type cleanmgr in the Run box and clean up files.
2. Open Command Prompt (Admin) and run:
sfc /scannow
DISM /Online /Cleanup-Image /restorehealt
3. Go to Control Panel > Power Options and uncheck Turn on fast startup.
4. Go to Settings > Update & Security > Uninstall updates and remove KB5048652.