This forum is for help with Windows 7
drivers, not Windows XP.
You must specifiy the exact model of your laptop when requesting drivers as each model requires different drivers. You can download them from Acer's website: http://support.acer.com/us/en/default.aspx
Choose your country at bottom-right of page before proceeding.
If your laptop came with Windows 7 pre-installed, Acer may not have any Windows XP drivers for it.
In that case you cannot run Windows XP on it.