Warning: You must uninstall all previous versions of Checkmate before installing Checkmate 5.3.1. Installing Checkmate 5.3.1 into an existing Checkmate environment will require a database upgrade. Please ensure that you have a valid database backup before proceeding with the installation. 

Minimum Requirements for Checkmate 5.3.1

Server
Windows Vista(SP1), Windows XP(SP2 and SP3) , Windows 7, Windows Server 2003/2008, (Linux not supported)
Minimum 2GB RAM
Fast disk drives – OS and Data on separate disk
Internet Access - High Speed for best performance
Internet Explorer 6, 7 or 8
SQL Server 2005/2008 - For the Checkmate SQL 2005 Installer 
Microsoft .Net Framework 2.0 or higher (32 Bit)
Microsoft .Net Framework 2.0 or higher (64 Bit)
Microsoft .Net Framework 2.0 Service Pack 2 (32 and 64 Bit)
Management Studio (32 and 64 Bit)

Client
Windows Vista(SP1), Windows XP(SP2 and SP3), Windows 7,(Linux not supported)
Minimum 1GB RAM
Microsoft MapPoint 2009 (If address look up feature required)
Internet Access - High Speed for best performance
Internet Explorer 6, 7 or 8
Microsoft .Net Framework 2.0 or higher (32 Bit)
Microsoft .Net Framework 2.0 or higher (64 Bit)
Microsoft .Net Framework 2.0 Service Pack 2 (32 and 64 Bit)