You receive error 1603 when you try to install the Exchange Server 2010 RU1

• The Group Policy object (GPO), ExecutionPolicy, defines one or both of the following policies:
  • MachinePolicy
  • UserPolicy

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Determine defined policies

1. Click Start
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   , and then type cmd in the Search programs and files box.
2. Right-click cmd.exe in the Programs list, and then click Run as administrator.
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   If you are prompted for an administrator password or for confirmation, type the password, or provide confirmation.
3. At the command prompt, copy or type the following command, and then press ENTER:
   mmc
4. On the File menu, click Add/Remove Snap-in.
5. Select Computer Management in the list of snap-ins, and then click Add.
6. Select Local Computer, and then click Finish.
7. Click Close, and then click OK.
8. Expand Computer Management, expand Services and Applications, and then click Services.
9. Right-click Windows Management Instrumentation, and then click Properties.
10. For Startup type, select Automatic, click Apply, and then click Start.
11. Close Microsoft Management Console.
12. Click Start
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    , point to All Programs, point to Accessories, point to Windows PowerShell, and then click Windows PowerShell.
13. At the command prompt, type the following command, and then press ENTER:
    get-executionpolicy –list
14. Note which policy, MachinePolicy or UserPolicy, is defined. If the policy is undefined, the policy is listed as Undefined. Note how each policy is defined, for example, with the execution policy AllSigned or Restricted.

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Locally defined execution policy

1. Click Start
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   , and then type cmd in the Search programs and files box.
2. Right-click cmd.exe in the Programs list, and then click Run as administrator.
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   If you are prompted for an administrator password or for confirmation, type the password, or provide confirmation.
3. At the command prompt, copy or type the following command, and then press ENTER:
   mmc
4. On the File menu, click Add/Remove Snap-in.
5. Click Add, select Group Policy Object Editor in the list of snap-ins, and then click Add.
6. Select Local Computer, and then click Finish.
7. Click OK.
8. Depending on which execution policy was defined, as noted in step 3 of the "Determine defined policies" section, follow the steps for MachinePolicy or UserPolicy as appropriate:
   
   For MachinePolicy:
   1. Expand Local Computer Policy, expand Computer Configuration, expand Administrative Templates, expand Windows Components, and then click Windows PowerShell.
   2. Right-click Turn on Script Execution, and then click Properties.
   3. Select Not Configured, and then click OK.
   For UserPolicy:
   1. Expand Local Computer Policy, expand User Configuration, expand Administrative Templates, expand Windows Components, and then click Windows PowerShell.
   2. Right-click Turn on Script Execution, and then click Properties.
   3. Select Not Configured, and then click OK.
9. Close Microsoft Management Console.
10. Click Start
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    , point to All Programs, point to Accessories, point to Windows PowerShell, and then click Windows PowerShell.
11. At the command prompt, type the following command, and then press ENTER:
    exchange_install_folder\bin\ServiceControl.ps1 AfterPatch
    Note In this command, the exchange_install_folder placeholder represents where the Exchange update rollup installer is located.
12. Install Exchange 2010 RU1 or Exchange 2010 RU2.

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Execution policy defined on AD DS

1. Click Start
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   , and then type cmd in the Search programs and files box.
2. Right-click cmd.exe in the Programs list, and then click Run as administrator.
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   If you are prompted for an administrator password or for confirmation, type the password, or provide confirmation.
3. At the command prompt, copy or type the following command, and then press ENTER:
   gpresult /z>PolicySettings.txt
4. Open the file PolicySettings.txt in Notepad.
5. Search for the following entry in the list:
   GPO: Servers - Baseline v2.0
   KeyName: KeyPath\PowerShell\ExecutionPolicy
   Value: KeyValues_comma_delimited_list
   State: Enabled
   Note where in the Group Policy hierarchy that this entry resides. Repeat this step to determine whether there are other entries that reference "PowerShell."
6. Click Start
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   , click Control Panel, double-click Administrative Tools, and then double-click Group Policy Management.
7. Locate the Group Policy object that defines the Windows PowerShell execution policy, and set this entry to Not Configure.
8. Click Start
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   , and then type cmd in the Search programs and files box.
9. Right-click cmd.exe in the Programs list, and then click Run as administrator.
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   If you are prompted for an administrator password or for confirmation, type the password, or provide confirmation.
10. At the command prompt, copy or type the following command, and then press ENTER:
    gpupdate /force
    This command forces replication of the policy change on all servers and user accounts.
11. On the Exchange 2010 server where the installation of the update rollup failed, click Start
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    , and then type cmd in the Search programs and files box.
12. Right-click cmd.exe in the Programs list, and then click Run as administrator.
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    If you are prompted for an administrator password or for confirmation, type the password, or provide confirmation.
13. At the command prompt, copy or type the following command, and then press ENTER:
    net start winmgmt
    This command starts WMI so that the Windows PowerShell script (ServiceControl.ps1) that is listed in step 15 can run successfully.
14. Click Start
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    , point to All Programs, point to Accessories, point to Windows PowerShell, and then click Windows PowerShell.
15. At the command prompt, type the following command, and then press ENTER:
    exchange_install_folder\bin\ServiceControl.ps1 AfterPatch
    Note In this command, the exchange_install_folder placeholder represents where the Exchange update rollup installer is located.
16. Install Exchange 2010 RU1 or Exchange 2010 RU2.

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