Allow software to run or install even if the signature is invalid
- Policy ID
- Advanced_InvalidSignatureBlock
- Scope
- Computer Configuration, User Configuration
- Supported on
- At least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1
- Source
- Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
- Category
- Windows Components › Internet Explorer › Internet Control Panel › Advanced Page
Description
This policy setting allows you to manage whether software, such as ActiveX controls and file downloads, can be installed or run by the user even though the signature is invalid. An invalid signature might indicate that someone has tampered with the file.
If you enable this policy setting, users will be prompted to install or run files with an invalid signature.
If you disable this policy setting, users cannot run or install files with an invalid signature.
If you do not configure this policy, users can choose to run or install files with an invalid signature.
Registry
ComputerHKEY_LOCAL_MACHINE
- RunInvalidSignaturesREG_DWORD
UserHKEY_CURRENT_USER
- RunInvalidSignaturesREG_DWORD