ACS Upgrade from 4.0(1) Build 44 to latest version

[j.pikul]

Hello:

I would like to upgrade my ACS server from 4.0(1) Build 44 to the latest version. Can anyone tell me the best way to do this? Thank you very much

[sadbulali]

You can reinstall ACS over the same version that is already installed. This procedure is also known as overinstalling ACS. You can also upgrade to ACS 4.2 from previous versions of ACS.You cannot directly upgrade from ACS 4.0 to ACS 4.2, you must first upgrade to ACS 4.1, and then upgrade to ACS 4.2.

http://www.cisco.com/en/US/docs/net_mgmt/cisco_secure_access_control_server_for_windows/4.2/installation/guide/windows/install.ht