When I try to upgrade Windows Server 2008 Edition from Standard to Enterprise/DataCenter, I always encounter the following error message (Error Code: 0x80070103)
The problem is that Windows Server 2008 Setup is looking for MSR partition which contains System Partition and it fails to find the drive contained MSR partition.
Assign a drive letter to MSR Partition.
Steps to assign a drive letter to MSR Partition
- Open Server Manager
Open Storage -> Disk Management
Right click on MSR Partition and select Change Drive Letter and Paths…
- Click Add button, select Drive letter and click OK
- Make sure MSR Partition has the requested free space available.