Please find below what components are compatible with Windows Server 2012 in Version 9.00A:
Automation Engine: 9.00A321-081 (Servicepack 7 Hotfix 2)
Utilities: 9.00A318-481 (Servicepack 6)
OS Agent: 9.00A318-481 (Servicepack 6)
Service Manager: 9.00A306-071 (Servicepack 5)
Service Manager Dialog: 9.00A306-072 (Servicepack 5)
Please keep in mind that components of an earlier release might work on Windows 2012, but we do not recommend using them, if it is causing issues, please be aware to upgrade your system to a version supporting Windows 2012.