the easiest way is to connect to the install depot on your windows installation server. usually this is the cell server.
1. login to your windows client on which you want to install dp agent
2. open explorer and connect to \\dpinstallserver\omniback
3. then browse to the directory which fits the OS on which you want to install the agent. x8664 is for x64 windows systems
4. start setup.exe
5. continue the wizard, select "client" as install type and continue wizard
6. select the agents you want to install on the client. you need at least the disk agent for filesystem backup. if you have a supported client/dp version, i suggest you also install Automatic Disaster Recovery Agent.
6.1 select other options if it is needed for your client
7. continue wizard
after installation you should see your windows client under "clients" in dp gui.
i suggest you always check the support matrix for your dp version if the client os and applications are supported
regards