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
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Jesse Flintoff
236
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
Windows for business | Windows Server | Devices and deployment | Set up, install, or upgrade
Windows for business | Windows Server | User experience | Other
Windows for business | Windows Client for IT Pros | User experience | Other
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Harry Leonard 1 Reputation point2022-09-29T09:35:13.517+00:00 Please make sure the backup disk is formatted for GPT...not MBR.
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Jesse Flintoff 236 Reputation points
2022-09-29T20:23:51.99+00:00 Hi there.
Thanks for the reply.
It fails with both.
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Harry Leonard 1 Reputation point
2022-09-29T20:45:07.91+00:00 Are you using partitions on the backup disk? If so, try deleting the partitions and re-formatting the backup drive. In other words...start fresh.
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Jesse Flintoff 236 Reputation points
2022-10-02T00:10:02.893+00:00 Hi there.
Thank you for the reply.
That does not fix it.
Kind regards
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