Event ID 1033, accompanied by the error message—Potentially revoked boot manager was detected in EFI partition—is said to occur when the update of the ...
If there are multiple drives installed in the computer, then it can create confusion as to which drive has a Bootloader. This scenario usually happens when Master Boot Record is on the wrong drive.
Commercially developed FinFisher malware now can infect Windows devices using a UEFI bootkit that it injects in the Windows Boot Manager. FinFisher (also known as FinSpy and Wingbird) is a ...