![After Windows Update (automatic) Red Message "Invalid Signature detected. Check Policy in Setup" - Dell Community After Windows Update (automatic) Red Message "Invalid Signature detected. Check Policy in Setup" - Dell Community](https://vjauj58549.i.lithium.com/community/s/legacyfs/online/en/communityserver.discussions.components.files/3518/IMG_20171216_075813%20small.jpg)
After Windows Update (automatic) Red Message "Invalid Signature detected. Check Policy in Setup" - Dell Community
Secure Boot Violation” may display when Secure Boot is enabled in BIOS and attempting to boot into Ubuntu and Debian - ThinkStation - Lenovo Support CH
![Invalid signature detected. Check secure boot policy in setup · Issue #1666 · ventoy/Ventoy · GitHub Invalid signature detected. Check secure boot policy in setup · Issue #1666 · ventoy/Ventoy · GitHub](https://user-images.githubusercontent.com/29574622/173393380-79ad91b8-f24d-473a-9c0c-373633d7786f.jpg)