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Graphics accelaeration disabled

Hello, I have W7 ultimate with a matrox 550 dual monitor config. It all worked fine. Then I got a mail virus and had to SystemRestore to last week's config. Now HW accel is disabled, according to freecell. The driver was the latest Msft knew about. HW accel was enabled on both monitors I (in displays->advanced->troubleshoot->accel=full) I downloaded a yet newer driver from matrox - same result; wth many reboots done. Any ideas?
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