Microsoft is helping customers that upgraded from Windows Vista to Windows 7 and then came across poor performance when printing documents from the new platform. “On a computer that’s running Windows 7 or Windows Server 2008 R2, the printing performance may be poor compared to the performance on a computer that’s running Vista or Windows Server 2008. Additionally, a computer that’s running Windows 7 or Windows Server 2008 R2 consumes more CPU resources when you print a document.
For e.g., CPU usage remains at 100 percent for a long time in Task Manager when you print a document on a computer that is running Windows 7 or Windows Server 2008 R2,” explained Microsoft in KB2295825.
A supported hotfix is available from Microsoft.