I followed the steps in this link: Solved problem
1st step: Checked BIOS and enabled the virtualization capability. 2nd step: Installed the Intel HAXM installer. 3rd step: Checked android studio and see if the problem is solved, it is not solved.
I checked youtube and google searches and I've done most of them. In coreinfo, my NX has an asterisk sign meaning the it is enabled already and I haven't done anything wrong in my bios setup.
EDIT: PC Specs Windows 7 Intel Core i3 2120 4GB RAM Asus H61M-E