Originally posted by Joe:
idhazza, what are ACT 3 and ACT 4.1?
ACT is the Application Compatibility Toolkit. Windows contains a database with old apps that need some patches (called qfix) to run well. With ACT you can read and modified this database. The different compatibility modes (we talk about in the banding thread) are predefined sets of qfixes. With ACT you can assign only the qfixes that are needed.