Installed PT HD 7.4 on Windows XP SP2 computer and now gets a DAE -1122 error. In this case the older drivers were still present from an older version of Protools. To fix this problem Protools was completely uninstalled from add/remove programs, the computer was rebooted and then 7.4 was installed again this time with the new drivers. The user had to update the Sync I/O firmaware as well with a download from Digidesign.