help me plz

[dark_2]

i install win 8.1 then i go to msconfig the i see numbers of core i check it but it only show 1 core i have dual core

 

[popatim]

make sure the "Number of Processors" box is unchecked.

 

[dark_2]

i go to task manager /performance the cores only 1

 

[popatim]

You need to reboot after unchecking the box. If it still shows a single core:
Which processor do you have exactly?
Check the bios and make sure there is no setting in there limiting the number of cores being used.
If you upgraded from a single core processor to a multi-core processor then you need to reinstall windows.
If you are using a 'previously used' harddrive then its possible that the previous system had a single core processor and you need to reinstall windows.

 

[dark_2]

ok thanks