I am assembling a new computer for my home by gigabyte F2A68HM-S1. FM2+ SOCKET. PROCESSOR IS AMD A4 4020 DUAL CORE 3.4 GHZ. 4gb kingston ram. I want to use wndows 7 32 bit. Please guide me for the best bios setup. I have no concept about WEFI and legacy option. Therefore after os installation always my computer going too slow to boot. And sometime it lost devices either hdd or dvd drive. And sometime both devices are not found after rebooting. Then my os showing the option to repair windows. I cant use my pc still now. Bios is already updated from my purchasing time.