Understanding In-Place Upgrades on Windows 11 24H2: TPM and BitLocker Considerations
Introduction
Performing an in-place upgrade of Windows 11 can be a straightforward way to update your system while preserving installed applications and settings. However, certain hardware configurations and security features, such as TPM (Trusted Platform Module) and BitLocker, can influence the process and outcomes. If you’re contemplating an in-place upgrade on a system with TPM disabled and BitLocker turned off, you might wonder whether these security features will be affected post-upgrade. This article aims to clarify these concerns and provide actionable advice.
Scenario Overview
Suppose you have a Windows 11 version 24H2 system with the following characteristics:
– TPM capability present but currently disabled
– BitLocker encryption disabled
– Secure Boot enabled (or adjustable)
– A history of custom unattended installation configurations, including removal of certain apps and adjustments to file system behavior
Your primary motivation for the upgrade stems from issues such as system stutters following recent updates, specifically KB5062553, and troubleshooting efforts including clean driver reinstallation and system health scans.
Key Questions
- Will an in-place upgrade automatically enable BitLocker when TPM is disabled but capable?
- How can you prevent BitLocker from activating during the upgrade process?
- How do TPM and Secure Boot settings influence the upgrade and security post-upgrade?
Understanding TPM and BitLocker Behavior During Upgrade
TPM (Trusted Platform Module):
– If your system’s hardware includes a TPM module but it is simply disabled in the BIOS/UEFI settings, Windows does not automatically enable or activate TPM features during an upgrade.
– Windows can recognize the TPM hardware but will not invoke it unless explicitly enabled. Disabling TPM in BIOS/UEFI simply prevents Windows from utilizing it, regardless of OS version updates or upgrades.
BitLocker Encryption:
– BitLocker is a full-disk encryption feature that may be enabled or disabled manually or via Group Policy.
– If BitLocker is not enabled prior to the upgrade, an in-place upgrade will not enable it automatically. However, certain system changes might trigger automatic encryption behaviors if the system detects hardware or security policy changes.
Effect of Upgrading with TPM Disabled and BitLocker Disabled:
– In general, a standard in-place upgrade will not enable BitLocker if it was previously disabled.
– The upgrade process respects your current security configurations, and no automatic encryption activation occurs unless specific policies or recovery options are triggered
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