How To: Uninstall and reinstall existing ArcGIS Image Server
Instructions provided describe how to uninstall and reinstall an existing version of ArcGIS Image Server. In situations where a complete uninstallation and reinstallation of Image Server and ArcGIS Desktop is required, follow the uninstallation order given below.
Stop all the ArcGIS Image Server related services and delete them from Windows services, using command sc delete <service name> from the Windows command line utility.
Go to Windows > Add or Remove Programs > ArcGIS Image Server and Click on Change. When the ArcGIS Image Server Setup dialog box opens up, click on option 'Remove'. (If required, secure existing *.ISDef, *.ISCDef files for future use and manually delete folders such as Image Server, which is typically located under C:\Documents and Settings\All Users\Application Data\ESRI\Image Server).
Make sure under C:\WINDOWS\assembly folder there are no Image Server assemblies referenced, such as ESRI.ImageServer.xxxx.
To uninstall ArcGIS Desktop, similar to above, go to Windows > Add or Remove Programs > ArcGIS Desktop and Click on Change. When the ArcGIS Setup dialog box opens up, click on option 'Remove'. (If necessary, manually delete C:\Program Files\ArcGIS and C:\Documents and Settings\<Profile Name>\Application Data\ESRI folders).
Repair\Uninstall Microsoft .Net Framework 2.0, if necessary.
Reboot the machine and follow the installation order given in the document titled, “What is the recommended order of installations to successfully install a complete ArcGIS Image Server“ located in the Related Information section below.