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Answer / Solution

Enable the required windows features manually as described below:

Solution for Windows 7:

1. In windows, press the start button and type 'Features'.
2. Select 'Programs and Features' on the right side.
3. In the window 'Programs and Features', on the left side, click on the link 'Turn windows features on or off'.
4. Enable the following windows features:
   1. Internet Information Services
   2. Internet Information Services > Web Management Tools
   3. Internet Information Services > Web Management Tools > IIS Management Console
   4. Internet Information Services > World Wide Web Services
   5. Internet Information Services > World Wide Web Services > Application Development Features > .NET Extensibility
   6. Internet Information Services > World Wide Web Services > Application Development Features > ASP.NET
   7. Internet Information Services > World Wide Web Services > Application Development Features > ISAPI Extensions
   8. Internet Information Services > World Wide Web Services > Application Development Features > ISAPI Filters
   9. Internet Information Services > World Wide Web Services > Common HTTP Features
   10. Internet Information Services > World Wide Web Services > Common HTTP Features > Static Content
5. Press the button 'Ok'.
6. Start the SpaceObServer Web Access setup again.
7. If the warning 'The setup requires DISM...' appears again, press continue.

Solution for Windows Server 2008 and Windows Server 2008 R2:

1. In windows, press the start button and type 'Server Manager'.
2. Select 'Server Manager'.
3. In the tree on the left side, choose 'Roles'.
4. In the section 'Roles Summary' press the link 'Add Roles'.
5. In the dialog press 'Next' until a list whith 'Roles' appears.
6. In the list check 'Web Server (IIS)' and press next until the IIS is enabled
7. When the IIS is installed, choose expand 'Roles' on the left side
8. Select Web Server (IIS)
9. Scroll down the window to the section 'Role Services' and click on the link 'Add Role Services'.
10. A Dialog pops up. Add the following role services (Some features are enabled by default. You can keep them enabled.):
    1. Web Server > Common HTTP Features
    2. Web Server > Common HTTP Features > Static Content
    3. Web Server > Application Development > ASP.NET
    4. Web Server > Application Development > .NET Extensibility
    5. Web Server > Application Development > ISAPI Filters
    6. Web Server > Application Development > ISAPI Extensions
    7. Management Tools
    8. Management Tools > IIS Management Console
11. In the dialog press 'Next' until all features are installed.
12. Start the SpaceObServer Web Access setup again.
13. If the warning 'The setup requires DISM...' appears again, press continue.

Solution for Windows 8:

1. In windows, press the start button and type 'Features'.
2. Select 'Programs and Features' on the right side.
3. In the window 'Programs and Features', on the left side, click on the link 'Turn windows features on or off'.
4. Enable the following windows features:
1. Internet Information Services
   (Some subfeatures will be enabled by default. You can keep them activated.)
2. Internet Information Services > Web Management Tools
3. Internet Information Services > Web Management Tools > IIS Management Console
4. Internet Information Services > World Wide Web Services
5. Internet Information Services > World Wide Web Services > Common HTTP Features
6. Internet Information Services > World Wide Web Services > Common HTTP Features > Static Content
7. Internet Information Services > World Wide Web Services > Application Development Features
8. Internet Information Services > World Wide Web Services > Application Development Features > ASP.NET 4.5
9. Internet Information Services > World Wide Web Services > Application Development Features > .NET Extensibility 4.5
10. Internet Information Services > World Wide Web Services > Application Development Features > ISAPI Filters
11. Internet Information Services > World Wide Web Services > Application Development Features > ISAPI Extensions
12. NET Framework 4.5 Advanced Services > ASP.NET 4.5
5. Press the button 'Ok'.
6. Start the SpaceObServer Web Access setup again.
7. If the warning 'The setup requires DISM...' appears again, press continue.

Solution for Windows Server >= 2012:

1. In windows, press the start button and type 'Server Manager'
2. Select 'Server Manager'
3. In the menu on the top left press 'Manage' > 'Add Roles and Features'
4. In the dialog press 'Next' until a list of 'Roles' appears
5. Scroll down and check the role 'Web Server (IIS)'
6. A dialog pops up. Click on the button 'Add Features'
7. Press the button 'Next'
8. In the list of features, enable the following:
   1. .NET Framework 4.5 Fatures
   2. .NET Framework 4.5 Fatures > ASP.NET 4.5
9. Press the button 'Next' until the list of 'Role services' appears and make sure, that following features are checked:
   1. Web Server > Common HTTP Features > Static Content
   2. Web Server > Management Tools > IIS Management Console
   3. Web Server > Application Development > .NET Extensibility 4.5
   4. Web Server > Application Development > ASP.NET 4.5
   5. Web Server > Application Development > ISAPI Extensions
   6. Web Server > Application Development > ISAPI Filters
10. Press the button 'Next'
11. Press the button 'Install'
12. Start the SpaceObServer Web Access setup again.
13. If the warning 'The setup requires DISM...' appears again, press continue.