Since this is ACS for windows make sure you follow the guide on what components are backed up and that you run ACS on the supported operating system, here is a good place to look for backups "c:\Program Files\CiscoSecure ACS v4.2\CSAuth\System Backups"
Here is the guide that you can follow on how to perform the system restore -
how to move ACS 4.2 to new server hardware (rebuild)
The ACS 4.2 comes in two flavors:
1. ACS appliance 1112, 1113 and 1120
2. ACS software running in Windows server
If you are not using the Cisco appliance and want to use a Server then you need to make sure that you are following the proper requirements, below you can find the proper hardware and software requirements:
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...