Various users have reported issues which prevent systems from being encrypted, which affect Microsoft's BitLocker encryption technology in the latest build of Windows 10. The issues reportedly occur only with clean installs of the Windows 10 November update, otherwise known as build 10586.
Microsoft TechNet Forum user 'nesoi' reports that after a clean install of the November update, BitLocker cannot be enabled in Windows 10 because the wizard to enable the feature will give a 'parameter is incorrect' error message. The user states that BitLocker will work for users who first enable the feature in the RTM version of Windows 10 (build 10240) and then upgrade to the November update (build 10586). However, if BitLocker is later disabled—either by the user or when the operating system's reset feature is used with the 'Keep Nothing' option—the error message will appear again when users attempt to re-encrypt their systems.
Reddit users have described similar experiences and have speculated that the issues are caused by the changes made to BitLocker in the latest build of Windows 10, and that they may not dependent on hardware.
While Microsoft has yet to officially address these issues with BitLocker, they may be related to the company's recent decision to inexplicably pull its Media Creation Tool for the November update. Affected users should submit feedback to the company to help ensure that the problems will be resolved.
Source: Microsoft TechNet Forums
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