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Error 0x800F0A1 when installing Windows Server 2008 R2 SP1 on a Veeam Backup & Replication server, solution

So this is an interesting one. In order to install SP1 they want you to disable the automount. From what I know about the automount, with it on you could seriously screw up your VM environment. So this guy found a work around

http://forums.veeam.com/veeam-backup-replication-f2/automount-disabled-and-winserver-2008-sp1-intall-problem-t6612.html

My syntax differed from his

Windows 2008 R2 Service Pack 1 only needs temporay access to the system partition which is prevented with automount disabled.
I installed the service pack as follows: (Drive J can be any free drive letter not used).

1. At command promtp: Type “mountvol /? “(This will display help and will also list volumes). Identify system partition (will not have drive letter) ie: \\?\Volume{9be074ce-d55f-11df-83d7-806e6f6e6963}
2. Mount a temporary drive letter to the system partion “mountvol j:/ \\?\Volume{9be074ce-d55f-11df-83d7-806e6f6e6963}” (Enter your own system partition guid).
3. Run SP 1 update and restart.
4. Dismount temporary drive “mountvol j: /d”.
Done.

For me it was mountvol j: \\?\Volume{9be074ce-d55f-11df-83d7-806e6f6e6963} (Enter your own system partition guid).

Also, I found you could just open up computer management and assign a drive letter to the funky 100MB or so partition there and it appears to accomplish the same thing! tally ho

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