rollOver,
PC-Doctor has been testing quad core CPUs for some time. It is true however that there is probably nothing to worry about.
This appears to be caused by the CPU entering its cool and quiet mode. When the multi-core test is initiated on a CPU in this state, the wakeup process causes the warning due to timing. Try rebooting and running the test again immediately after reboot, it should pass then.
There is a p5i setting that you can adjust to give it a little extra time to come up to full speed. This would be in the pcdrcpu.p5i file, find the line;
Test.MultiCoreTest.errorCorrectionPercent.value = 50.0
Change it to:
Test.MultiCoreTest.errorCorrectionPercent.value = 60.0
Please let me know the results and if you running Vista 32 or 64?
-Fred