Canon LBP7210Cdn Manual page 117

(1) Select the folders in the supplied CD-ROM: [English] - [x64] - [Driver].
(2) Click [OK].
NOTE
If you are not sure whether you are using a 32-bit operating system or 64-bit operating
system
"To Check the Processor Version of Windows Vista or Server 2008"
Click [Next].
The installation starts.
Click [Close].