Dell Powervault DL2300 - Manual (Page 6)

Upgrading from Windows Server 2008 x64 to Windows Server 2008 R2 for CommVault™ Simpana™
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Figure 2: Pausing the Job Queue
3. Uninstall Dell Server Administrator
a. Navigate to Start -> Control Panel -> Programs and Features
Figure 3: Uninstalling OMSA
b. If this uninstallation procedure appears to hang, start the task manager.