< CCSv4
By default, Microsoft Windows Vista and Windows 7 do not allow user level accounts to write files in the "Program Files" directory. This can prevent CCS from starting when installed in the "Program Files" or "Program Files (x86)" directory, because CCS stores configuration data by default in its install directory. Either of the following workarounds can be used to avoid this problem:

Install CCS outside the "Program Files" or "Program Files (x86)" directory
Instruct CCS to store configuration data outside the "Program Files" or "Program Files (x86)" directory using the -configuration command line argument. The problem will not occur when running CCS as the Administrator user, but this is not recommended because it compromises the Windows Vista security model