Install Windows 8 by upgrading from Windows 7 using the “Acer Upgrade Assistant Tool”, can be downloaded here: but how? there are two option upgrade from windows 7 and clean install.

The solution is we must replace the default Windows 8 drivers with the appropriate driver from the laptop manufacturer, in this case the ACER. but when the driver does not match, it becomes a new problem: “IRQL_NOT_LESS_OR_EQUAL”. This happens because the default driver (WLAN & AHCI) of windows 8 does not match with this laptop.Īs we all know Windows 8 is included with a number of drivers, so it’s like a linux OS, the PC / Laptop could be used without installing the driver again. This is the phrase that often comes up when I was looking for a solution to the same problem, it seems this is a common problem for the laptop users.

Update: Windows 8.1 working flawlessly in this laptop v5-431, no more error It seems some of my visitor cannot read “Bahasa Indonesia”, so i have fixed my grammar in the original post so you could translate it to english with better result, but i think why not make a new post here:P

Acer upgrade assistant tool download