Solve : Mouse Scroll Wheel Locks Up the Computer?

1.	Solve : Mouse Scroll Wheel Locks Up the Computer?
Answer» On occasion when using the scroll feature I get that dreaded spinning wheel. The only option I have at that time is to POWER the computer down and wait at LEAST 15 minutes. If I reboot sooner the monitor will not COME back on. I suspect a video card issue but looking for POSSIBLE causes and SOLUTIONS. Thanks in advance. Machine is a MacPro 1.1, 2.66 GHz running Mac OS X

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