Friends as we all known that the Mentioned converter is a great software to convert videos , but since reinstalled w7 ultimate it’s not utilizing all core that my cpu have which makes it take more time the normal 
it only utilize 16 - 17.69 % of my cpu
AND first it use to use like 80 - 100 %
and the convertion was faster
TRIED TO TWEAK THE SETTINGS IN " PREFERENCES " BUT NO USE .
^^
Use Any Video Converter
or
Freemake Video Converter
they are free
they are good
I tried xilisoft , after conversion the videos were running upside down , found this BDlot video converter facebook giveaway LotSoft - Free for Fans | Facebook , so using this now , at least it works.
MEGUI uses all cores … infact x264 uses all cores which is the primary component in ALL s/w
Are their any free converters with ATI gpu acceleration? AVIVO sucks
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Freemake looks good , did not like Any Video
Xillisoft (limited)
Cyberlink Media Expresso(good)
Mediacoder is also a great software with lots of advance options
i use Mediacoder and Freemake
Sorry is this thread about what you guys use to encode your videos? No Right! So stop posting what you use for converting instead of helping the OP!
If you have even used Xilisoft Video Converter Ultimate, You’ll know that its the Best one out there.
@OP
1} On mine I see the 4 CPU’s marked in this image. How many do you see there?
2} Check your Task Manager, Performance Tab.
On Both these places you should see 6 cores, If you don’t you’ll have to change some settings in MSconfig>Boot>Advanced Options>Number of Processors
Xilisoft is worst video convertor.
Try handbrake,xmediarecode,Super
You will find CPU usage priority in some of these as normal/above normal.
Handbrake is damn fast.