I tested Asus X451C use Windows 8.1 64 bit. This laptop more faster installed Win 8.1 than Win 7 is. Yes, and the most Important one, all driver are installed...
First of all. HP Pavilion 10-f001au basic chipset is AMD Chipset With AMD Dual-Core A4-1200 APU and Radeon HD 8180 Graphics. Is not bad for medium user...