Delay in start

Question

After the recent update, I'm facing a long delay in starting Windows after signing in, and sometimes it fails to proceed further. I do not have the option to uninstall the latest updates, and this performance is quite annoying. Thank you.

Answer 1

If you are unable to uninstall the update that caused the problem, open the Settings App.

Go to System - Recovery.

Click the 'Reinstall Now' button in the 'Fix problems with Windows Updates' section, then wait for that process to complete.

This process should any problems caused by that update, and this process will not affect your files, settings or installed apps.

Answer 2

Though it says, "If the delay started immediately after a specific update and uninstall is not available, installing the latest cumulative update for the device’s Windows 11 build (which supersedes earlier problematic updates) is the primary supported path to restore normal startup and logon performance.", I'm unable to install the latest update for Windows 11 build.

Answer 3

The described behavior matches known post‑update startup or logon delays seen on Windows.

For long delays or apparent hangs right after signing in (before the desktop is fully usable), one common cause on supported Windows versions is high CPU usage during logon by system components that process apps and updates. On Windows 8.1 and Windows Server 2012 R2, this was specifically traced to AppxDeploymentServer.dll performing many enumeration and applicability checks at logon, which caused:

1. Very long time at the user logon interface.
2. An svchost.exe process using 100% of one CPU core continuously.
3. The system appearing non‑idle or unresponsive.

That issue was resolved by installing a cumulative update (KB2919355) for those platforms.

On more recent Windows 10/11 scenarios, similar symptoms after updates can also be caused when update processing does not complete within the expected time window during shutdown or restart. In such cases, Windows can appear to hang while working on updates and then roll them back, which may leave the system repeatedly trying to complete update tasks on subsequent boots. The documented workaround is to increase the timeout for the TrustedInstaller service in the registry so that update installation can complete successfully, then reapply the update.

Additionally, disabling IPv6 incorrectly can introduce a repeatable startup delay (about five seconds) on affected Windows versions because the logic that avoids waiting for IPv6 registration is not recognized when IPv6 is manually disabled. This is resolved by installing the relevant update or hotfix for the OS version.

Given these patterns, the most reliable remediation paths supported in the documentation are:

1. Ensure all post‑update cumulative updates and hotfixes are installed via Windows Update, as Microsoft often ships follow‑up fixes for performance regressions (such as logon delays or startup hangs) introduced by earlier updates.
2. If Windows Update is hanging and rolling back updates during restart, adjust the TrustedInstaller timeout as documented, restart, and then reapply the problematic update so that it can complete instead of being reverted.
3. If IPv6 was disabled manually, re‑enable it or install the documented update/hotfix that corrects the startup delay behavior.

If the delay started immediately after a specific update and uninstall is not available, installing the latest cumulative update for the device’s Windows 11 build (which supersedes earlier problematic updates) is the primary supported path to restore normal startup and logon performance.

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References:

• User logon takes a long time in Windows 8.1 or Windows Server 2012 R2
• Windows Update hangs and new updates are uninstalled after a restart
• Startup delay occurs after you disable IPv6 in Windows
• AVD users might experience extended time on a black screen during logon and SSO failures