Many users prefer downgrading into a faster OS like Windows XP than install Windows 7 into ASUS 1101HA because of the speed and performance XP brings. Unfortunately, it is not very easy to downgrade to XP on a netbook, especially if you have no external CD drive. The only solution is going to USB sticks.
The only BIOS version that support Win XP ACPI drivers is 208, which is hard to get. But if you are using Viper flash BIOS tool, you can flash the Asus 1101HA to make it work again. First of all, you have to go to XP first by pressing F9 when booting. This will load the recovery system. After XP installation, use Viper Flash BIOS tool.
Viper flash BIOS tool allows you to create a bootable USB in order to flash the BIOS version, especially the BIOS ACPI drivers to BIOS version 208 and with the latest ACPI drivers on ASUS support page version 6.1.11023 would make a great combo to fully overclock with SHE.
Download ASUS Eee PC 1101HA drivers
Hopefully it works fine on your netbook.
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