Slow Bitlocker Pre-boot (PIN) Delay After 24H2 Update (Continued Discussion)

Question

Continued discussion from previous thread. Please comment and upvote if you experience this bug.

Bug Report: When PIN + TPM is enabled on 24H2, the BitLocker pin screen, which appears immediately after the BIOS posts, takes a significant amount of time to fully display, impeding boot times and causing significant user frustration. Additional, it's been discovered that certain USB devices can add 5+ minutes to this issue. The issue exists without any USB devices plugged in, however. This is also not a hardware related issue.

When one experiences this bug, the timeline of booting/rebooting your PC looks something like:

• BIOS posts (BIOS/motherboard/OEM logo)
• The screen turns blue slowly, painting over 1-2 seconds, starting from the top.
• (1-2 second later), it displays the words "Bitlocker" at the top.
• (1-2 second later), it displays the words "Enter the PIN..."
• (1-2 second later), it displays the PIN entry box.
• (1-2 second later), characters will now appear in the PIN entry box. At this point, it's back to normal speed.

Additional Observations:

• When the screen turns blue, the user can start typing the pin, but it won't show in the entry box until the screen has fully loaded. Once fully loaded, the PIN will type itself into the box, very quickly, 1 character at a time.
• Some USB devices will make the BitLocker PIN screen take 5-8 minutes to fully load.

Considerations / Suggestions: See below for details, but essentially, I request that Microsoft rewrite the BitLocker pin screen. It's dated, old, slow, and clunky. All other OSes, from macOS to Ubuntu, have had significantly better pre-boot drive encryption pin screens that perform better, look better, with great functionality.

Community Discussion: The purpose of this thread is to engage in community/user discussion, see who else is affected, and track any changes Microsoft makes regarding this bug. This has been a reported issue since at least September 2024.

Answer 1

I'm the OP of the original ticket and have been tracking this.

Looks like a release to fix this issue is getting close. Here is the latest update (May 19, 2025):

https://blogs.windows.com/windows-insider/2025/05/19/releasing-windows-11-build-26100-4188-to-the-release-preview-channel/:
"[Boot menu screens] Fixed: This update addresses the issue where early boot screens, such as BitLocker PIN, BitLocker Recovery key, and boot menu screens, render slowly."

Answer 2

It has now been released in KB5058499:

https://support.microsoft.com/en-us/topic/may-28-2025-kb5058499-os-build-26100-4202-preview-d4c2f1ee-8138-4038-b705-546945076f92

• [Boot menu screens] Fixed: This update addresses the issue where early boot screens, such as BitLocker PIN, BitLocker Recovery key, and boot menu screens, render slowly.

Answer 3

it's been two weeks.

You said: "a discovery for extra time was needed to boot with bitlocker because of USD devices yet, no hardware issues" I assume you mean cache, mem, paging and i/o delays. they are not violating Windows settings-system-Advanced properties-"Optional" performace security and the Data Execution Prvention protects programs and service ONLY. i suggested it a very long time ago that Windows System intellegance did NOT involve itself when it came to handing off to the boot and let the Bios control it in AVX-512 for flashback or recovery, and only isolate on CORE, security performance equations and secure boot storage.