Seems to be a microsoft bug. See here - https://support.sophos.com/support/s/article/KB-000045621?language=en_US
Windows Backup failed to get an exclusive lock on the EFI system partition (ESP) - Symantec Endpoint Protection
Jesse Flintoff
221
Reputation points
Hello everyone.
I have 30 odd Windows 10 & Windows 2019/2022 Servers that get this error randomly when performing a Bare Metal backup using Windows Backup to internal and external hard drives.
Error: Windows Backup failed to get an exclusive lock on the EFI system partition (ESP)
If I re-run the backup immediately. It works fine 9 times out of 10.
Anyone else having the same issue?
Kind regards
Jesse